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-rw-r--r--src/analyze/analyze-security.c2220
1 files changed, 2220 insertions, 0 deletions
diff --git a/src/analyze/analyze-security.c b/src/analyze/analyze-security.c
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--- /dev/null
+++ b/src/analyze/analyze-security.c
@@ -0,0 +1,2220 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sys/utsname.h>
+
+#include "analyze-security.h"
+#include "bus-error.h"
+#include "bus-map-properties.h"
+#include "bus-unit-util.h"
+#include "bus-util.h"
+#include "env-util.h"
+#include "format-table.h"
+#include "in-addr-util.h"
+#include "locale-util.h"
+#include "macro.h"
+#include "missing_capability.h"
+#include "missing_sched.h"
+#include "nulstr-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "pretty-print.h"
+#if HAVE_SECCOMP
+# include "seccomp-util.h"
+#endif
+#include "set.h"
+#include "stdio-util.h"
+#include "strv.h"
+#include "terminal-util.h"
+#include "unit-def.h"
+#include "unit-name.h"
+
+struct security_info {
+ char *id;
+ char *type;
+ char *load_state;
+ char *fragment_path;
+ bool default_dependencies;
+
+ uint64_t ambient_capabilities;
+ uint64_t capability_bounding_set;
+
+ char *user;
+ char **supplementary_groups;
+ bool dynamic_user;
+
+ bool ip_address_deny_all;
+ bool ip_address_allow_localhost;
+ bool ip_address_allow_other;
+
+ bool ip_filters_custom_ingress;
+ bool ip_filters_custom_egress;
+
+ char *keyring_mode;
+ char *protect_proc;
+ char *proc_subset;
+ bool lock_personality;
+ bool memory_deny_write_execute;
+ bool no_new_privileges;
+ char *notify_access;
+ bool protect_hostname;
+
+ bool private_devices;
+ bool private_mounts;
+ bool private_network;
+ bool private_tmp;
+ bool private_users;
+
+ bool protect_control_groups;
+ bool protect_kernel_modules;
+ bool protect_kernel_tunables;
+ bool protect_kernel_logs;
+ bool protect_clock;
+
+ char *protect_home;
+ char *protect_system;
+
+ bool remove_ipc;
+
+ bool restrict_address_family_inet;
+ bool restrict_address_family_unix;
+ bool restrict_address_family_netlink;
+ bool restrict_address_family_packet;
+ bool restrict_address_family_other;
+
+ uint64_t restrict_namespaces;
+ bool restrict_realtime;
+ bool restrict_suid_sgid;
+
+ char *root_directory;
+ char *root_image;
+
+ bool delegate;
+ char *device_policy;
+ bool device_allow_non_empty;
+
+ char **system_call_architectures;
+
+ bool system_call_filter_allow_list;
+ Set *system_call_filter;
+
+ uint32_t _umask;
+};
+
+struct security_assessor {
+ const char *id;
+ const char *description_good;
+ const char *description_bad;
+ const char *description_na;
+ const char *url;
+ uint64_t weight;
+ uint64_t range;
+ int (*assess)(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description);
+ size_t offset;
+ uint64_t parameter;
+ bool default_dependencies_only;
+};
+
+static void security_info_free(struct security_info *i) {
+ if (!i)
+ return;
+
+ free(i->id);
+ free(i->type);
+ free(i->load_state);
+ free(i->fragment_path);
+
+ free(i->user);
+
+ free(i->protect_home);
+ free(i->protect_system);
+
+ free(i->root_directory);
+ free(i->root_image);
+
+ free(i->keyring_mode);
+ free(i->protect_proc);
+ free(i->proc_subset);
+ free(i->notify_access);
+
+ free(i->device_policy);
+
+ strv_free(i->supplementary_groups);
+ strv_free(i->system_call_architectures);
+
+ set_free(i->system_call_filter);
+}
+
+static bool security_info_runs_privileged(const struct security_info *i) {
+ assert(i);
+
+ if (STRPTR_IN_SET(i->user, "0", "root"))
+ return true;
+
+ if (i->dynamic_user)
+ return false;
+
+ return isempty(i->user);
+}
+
+static int assess_bool(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ const bool *b = data;
+
+ assert(b);
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = a->parameter ? *b : !*b;
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_user(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ _cleanup_free_ char *d = NULL;
+ uint64_t b;
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (streq_ptr(info->user, NOBODY_USER_NAME)) {
+ d = strdup("Service runs under as '" NOBODY_USER_NAME "' user, which should not be used for services");
+ b = 9;
+ } else if (info->dynamic_user && !STR_IN_SET(info->user, "0", "root")) {
+ d = strdup("Service runs under a transient non-root user identity");
+ b = 0;
+ } else if (info->user && !STR_IN_SET(info->user, "0", "root", "")) {
+ d = strdup("Service runs under a static non-root user identity");
+ b = 0;
+ } else {
+ *ret_badness = 10;
+ *ret_description = NULL;
+ return 0;
+ }
+
+ if (!d)
+ return log_oom();
+
+ *ret_badness = b;
+ *ret_description = TAKE_PTR(d);
+
+ return 0;
+}
+
+static int assess_protect_home(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ const char *description;
+ uint64_t badness;
+ char *copy;
+ int r;
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ badness = 10;
+ description = "Service has full access to home directories";
+
+ r = parse_boolean(info->protect_home);
+ if (r < 0) {
+ if (streq_ptr(info->protect_home, "read-only")) {
+ badness = 5;
+ description = "Service has read-only access to home directories";
+ } else if (streq_ptr(info->protect_home, "tmpfs")) {
+ badness = 1;
+ description = "Service has access to fake empty home directories";
+ }
+ } else if (r > 0) {
+ badness = 0;
+ description = "Service has no access to home directories";
+ }
+
+ copy = strdup(description);
+ if (!copy)
+ return log_oom();
+
+ *ret_badness = badness;
+ *ret_description = copy;
+
+ return 0;
+}
+
+static int assess_protect_system(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ const char *description;
+ uint64_t badness;
+ char *copy;
+ int r;
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ badness = 10;
+ description = "Service has full access to the OS file hierarchy";
+
+ r = parse_boolean(info->protect_system);
+ if (r < 0) {
+ if (streq_ptr(info->protect_system, "full")) {
+ badness = 3;
+ description = "Service has very limited write access to the OS file hierarchy";
+ } else if (streq_ptr(info->protect_system, "strict")) {
+ badness = 0;
+ description = "Service has strict read-only access to the OS file hierarchy";
+ }
+ } else if (r > 0) {
+ badness = 5;
+ description = "Service has limited write access to the OS file hierarchy";
+ }
+
+ copy = strdup(description);
+ if (!copy)
+ return log_oom();
+
+ *ret_badness = badness;
+ *ret_description = copy;
+
+ return 0;
+}
+
+static int assess_root_directory(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness =
+ empty_or_root(info->root_directory) &&
+ empty_or_root(info->root_image);
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_capability_bounding_set(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = !!(info->capability_bounding_set & a->parameter);
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_umask(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ char *copy = NULL;
+ const char *d;
+ uint64_t b;
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (!FLAGS_SET(info->_umask, 0002)) {
+ d = "Files created by service are world-writable by default";
+ b = 10;
+ } else if (!FLAGS_SET(info->_umask, 0004)) {
+ d = "Files created by service are world-readable by default";
+ b = 5;
+ } else if (!FLAGS_SET(info->_umask, 0020)) {
+ d = "Files created by service are group-writable by default";
+ b = 2;
+ } else if (!FLAGS_SET(info->_umask, 0040)) {
+ d = "Files created by service are group-readable by default";
+ b = 1;
+ } else {
+ d = "Files created by service are accessible only by service's own user by default";
+ b = 0;
+ }
+
+ copy = strdup(d);
+ if (!copy)
+ return log_oom();
+
+ *ret_badness = b;
+ *ret_description = copy;
+
+ return 0;
+}
+
+static int assess_keyring_mode(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = !streq_ptr(info->keyring_mode, "private");
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_protect_proc(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (streq_ptr(info->protect_proc, "noaccess"))
+ *ret_badness = 1;
+ else if (STRPTR_IN_SET(info->protect_proc, "invisible", "ptraceable"))
+ *ret_badness = 0;
+ else
+ *ret_badness = 3;
+
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_proc_subset(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = !streq_ptr(info->proc_subset, "pid");
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_notify_access(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = streq_ptr(info->notify_access, "all");
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_remove_ipc(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (security_info_runs_privileged(info))
+ *ret_badness = UINT64_MAX;
+ else
+ *ret_badness = !info->remove_ipc;
+
+ *ret_description = NULL;
+ return 0;
+}
+
+static int assess_supplementary_groups(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (security_info_runs_privileged(info))
+ *ret_badness = UINT64_MAX;
+ else
+ *ret_badness = !strv_isempty(info->supplementary_groups);
+
+ *ret_description = NULL;
+ return 0;
+}
+
+static int assess_restrict_namespaces(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = !!(info->restrict_namespaces & a->parameter);
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static int assess_system_call_architectures(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ char *d;
+ uint64_t b;
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (strv_isempty(info->system_call_architectures)) {
+ b = 10;
+ d = strdup("Service may execute system calls with all ABIs");
+ } else if (strv_equal(info->system_call_architectures, STRV_MAKE("native"))) {
+ b = 0;
+ d = strdup("Service may execute system calls only with native ABI");
+ } else {
+ b = 8;
+ d = strdup("Service may execute system calls with multiple ABIs");
+ }
+
+ if (!d)
+ return log_oom();
+
+ *ret_badness = b;
+ *ret_description = d;
+
+ return 0;
+}
+
+#if HAVE_SECCOMP
+
+static bool syscall_names_in_filter(Set *s, bool allow_list, const SyscallFilterSet *f, const char **ret_offending_syscall) {
+ const char *syscall;
+
+ NULSTR_FOREACH(syscall, f->value) {
+ int id;
+
+ if (syscall[0] == '@') {
+ const SyscallFilterSet *g;
+
+ assert_se(g = syscall_filter_set_find(syscall));
+ if (syscall_names_in_filter(s, allow_list, g, ret_offending_syscall))
+ return true; /* bad! */
+
+ continue;
+ }
+
+ /* Let's see if the system call actually exists on this platform, before complaining */
+ id = seccomp_syscall_resolve_name(syscall);
+ if (id < 0)
+ continue;
+
+ if (set_contains(s, syscall) == allow_list) {
+ log_debug("Offending syscall filter item: %s", syscall);
+ if (ret_offending_syscall)
+ *ret_offending_syscall = syscall;
+ return true; /* bad! */
+ }
+ }
+
+ *ret_offending_syscall = NULL;
+ return false;
+}
+
+static int assess_system_call_filter(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(a);
+ assert(info);
+ assert(ret_badness);
+ assert(ret_description);
+
+ assert(a->parameter < _SYSCALL_FILTER_SET_MAX);
+ const SyscallFilterSet *f = syscall_filter_sets + a->parameter;
+
+ char *d = NULL;
+ uint64_t b;
+
+ if (!info->system_call_filter_allow_list && set_isempty(info->system_call_filter)) {
+ d = strdup("Service does not filter system calls");
+ b = 10;
+ } else {
+ bool bad;
+ const char *offender = NULL;
+
+ log_debug("Analyzing system call filter, checking against: %s", f->name);
+ bad = syscall_names_in_filter(info->system_call_filter, info->system_call_filter_allow_list, f, &offender);
+ log_debug("Result: %s", bad ? "bad" : "good");
+
+ if (info->system_call_filter_allow_list) {
+ if (bad) {
+ (void) asprintf(&d, "System call allow list defined for service, and %s is included "
+ "(e.g. %s is allowed)",
+ f->name, offender);
+ b = 9;
+ } else {
+ (void) asprintf(&d, "System call allow list defined for service, and %s is not included",
+ f->name);
+ b = 0;
+ }
+ } else {
+ if (bad) {
+ (void) asprintf(&d, "System call deny list defined for service, and %s is not included "
+ "(e.g. %s is allowed)",
+ f->name, offender);
+ b = 10;
+ } else {
+ (void) asprintf(&d, "System call deny list defined for service, and %s is included",
+ f->name);
+ b = 0;
+ }
+ }
+ }
+
+ if (!d)
+ return log_oom();
+
+ *ret_badness = b;
+ *ret_description = d;
+
+ return 0;
+}
+
+#endif
+
+static int assess_ip_address_allow(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ char *d = NULL;
+ uint64_t b;
+
+ assert(info);
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (info->ip_filters_custom_ingress || info->ip_filters_custom_egress) {
+ d = strdup("Service defines custom ingress/egress IP filters with BPF programs");
+ b = 0;
+ } else if (!info->ip_address_deny_all) {
+ d = strdup("Service does not define an IP address allow list");
+ b = 10;
+ } else if (info->ip_address_allow_other) {
+ d = strdup("Service defines IP address allow list with non-localhost entries");
+ b = 5;
+ } else if (info->ip_address_allow_localhost) {
+ d = strdup("Service defines IP address allow list with only localhost entries");
+ b = 2;
+ } else {
+ d = strdup("Service blocks all IP address ranges");
+ b = 0;
+ }
+
+ if (!d)
+ return log_oom();
+
+ *ret_badness = b;
+ *ret_description = d;
+
+ return 0;
+}
+
+static int assess_device_allow(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ char *d = NULL;
+ uint64_t b;
+
+ assert(info);
+ assert(ret_badness);
+ assert(ret_description);
+
+ if (STRPTR_IN_SET(info->device_policy, "strict", "closed")) {
+
+ if (info->device_allow_non_empty) {
+ d = strdup("Service has a device ACL with some special devices");
+ b = 5;
+ } else {
+ d = strdup("Service has a minimal device ACL");
+ b = 0;
+ }
+ } else {
+ d = strdup("Service has no device ACL");
+ b = 10;
+ }
+
+ if (!d)
+ return log_oom();
+
+ *ret_badness = b;
+ *ret_description = d;
+
+ return 0;
+}
+
+static int assess_ambient_capabilities(
+ const struct security_assessor *a,
+ const struct security_info *info,
+ const void *data,
+ uint64_t *ret_badness,
+ char **ret_description) {
+
+ assert(ret_badness);
+ assert(ret_description);
+
+ *ret_badness = info->ambient_capabilities != 0;
+ *ret_description = NULL;
+
+ return 0;
+}
+
+static const struct security_assessor security_assessor_table[] = {
+ {
+ .id = "User=/DynamicUser=",
+ .description_bad = "Service runs as root user",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#User=",
+ .weight = 2000,
+ .range = 10,
+ .assess = assess_user,
+ },
+ {
+ .id = "SupplementaryGroups=",
+ .description_good = "Service has no supplementary groups",
+ .description_bad = "Service runs with supplementary groups",
+ .description_na = "Service runs as root, option does not matter",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SupplementaryGroups=",
+ .weight = 200,
+ .range = 1,
+ .assess = assess_supplementary_groups,
+ },
+ {
+ .id = "PrivateDevices=",
+ .description_good = "Service has no access to hardware devices",
+ .description_bad = "Service potentially has access to hardware devices",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#PrivateDevices=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, private_devices),
+ },
+ {
+ .id = "PrivateMounts=",
+ .description_good = "Service cannot install system mounts",
+ .description_bad = "Service may install system mounts",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#PrivateMounts=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, private_mounts),
+ },
+ {
+ .id = "PrivateNetwork=",
+ .description_good = "Service has no access to the host's network",
+ .description_bad = "Service has access to the host's network",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#PrivateNetwork=",
+ .weight = 2500,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, private_network),
+ },
+ {
+ .id = "PrivateTmp=",
+ .description_good = "Service has no access to other software's temporary files",
+ .description_bad = "Service has access to other software's temporary files",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#PrivateTmp=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, private_tmp),
+ .default_dependencies_only = true,
+ },
+ {
+ .id = "PrivateUsers=",
+ .description_good = "Service does not have access to other users",
+ .description_bad = "Service has access to other users",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#PrivateUsers=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, private_users),
+ },
+ {
+ .id = "ProtectControlGroups=",
+ .description_good = "Service cannot modify the control group file system",
+ .description_bad = "Service may modify the control group file system",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectControlGroups=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, protect_control_groups),
+ },
+ {
+ .id = "ProtectKernelModules=",
+ .description_good = "Service cannot load or read kernel modules",
+ .description_bad = "Service may load or read kernel modules",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectKernelModules=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, protect_kernel_modules),
+ },
+ {
+ .id = "ProtectKernelTunables=",
+ .description_good = "Service cannot alter kernel tunables (/proc/sys, …)",
+ .description_bad = "Service may alter kernel tunables",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectKernelTunables=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, protect_kernel_tunables),
+ },
+ {
+ .id = "ProtectKernelLogs=",
+ .description_good = "Service cannot read from or write to the kernel log ring buffer",
+ .description_bad = "Service may read from or write to the kernel log ring buffer",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectKernelLogs=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, protect_kernel_logs),
+ },
+ {
+ .id = "ProtectClock=",
+ .description_good = "Service cannot write to the hardware clock or system clock",
+ .description_bad = "Service may write to the hardware clock or system clock",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectClock=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, protect_clock),
+ },
+ {
+ .id = "ProtectHome=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectHome=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_protect_home,
+ .default_dependencies_only = true,
+ },
+ {
+ .id = "ProtectHostname=",
+ .description_good = "Service cannot change system host/domainname",
+ .description_bad = "Service may change system host/domainname",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectHostname=",
+ .weight = 50,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, protect_hostname),
+ },
+ {
+ .id = "ProtectSystem=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectSystem=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_protect_system,
+ .default_dependencies_only = true,
+ },
+ {
+ .id = "RootDirectory=/RootImage=",
+ .description_good = "Service has its own root directory/image",
+ .description_bad = "Service runs within the host's root directory",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RootDirectory=",
+ .weight = 200,
+ .range = 1,
+ .assess = assess_root_directory,
+ .default_dependencies_only = true,
+ },
+ {
+ .id = "LockPersonality=",
+ .description_good = "Service cannot change ABI personality",
+ .description_bad = "Service may change ABI personality",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#LockPersonality=",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, lock_personality),
+ },
+ {
+ .id = "MemoryDenyWriteExecute=",
+ .description_good = "Service cannot create writable executable memory mappings",
+ .description_bad = "Service may create writable executable memory mappings",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#MemoryDenyWriteExecute=",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, memory_deny_write_execute),
+ },
+ {
+ .id = "NoNewPrivileges=",
+ .description_good = "Service processes cannot acquire new privileges",
+ .description_bad = "Service processes may acquire new privileges",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#NoNewPrivileges=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, no_new_privileges),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_ADMIN",
+ .description_good = "Service has no administrator privileges",
+ .description_bad = "Service has administrator privileges",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = UINT64_C(1) << CAP_SYS_ADMIN,
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SET(UID|GID|PCAP)",
+ .description_good = "Service cannot change UID/GID identities/capabilities",
+ .description_bad = "Service may change UID/GID identities/capabilities",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SETUID)|
+ (UINT64_C(1) << CAP_SETGID)|
+ (UINT64_C(1) << CAP_SETPCAP),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_PTRACE",
+ .description_good = "Service has no ptrace() debugging abilities",
+ .description_bad = "Service has ptrace() debugging abilities",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_PTRACE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_TIME",
+ .description_good = "Service processes cannot change the system clock",
+ .description_bad = "Service processes may change the system clock",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = UINT64_C(1) << CAP_SYS_TIME,
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_NET_ADMIN",
+ .description_good = "Service has no network configuration privileges",
+ .description_bad = "Service has network configuration privileges",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_NET_ADMIN),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_RAWIO",
+ .description_good = "Service has no raw I/O access",
+ .description_bad = "Service has raw I/O access",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_RAWIO),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_MODULE",
+ .description_good = "Service cannot load kernel modules",
+ .description_bad = "Service may load kernel modules",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_MODULE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_AUDIT_*",
+ .description_good = "Service has no audit subsystem access",
+ .description_bad = "Service has audit subsystem access",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_AUDIT_CONTROL) |
+ (UINT64_C(1) << CAP_AUDIT_READ) |
+ (UINT64_C(1) << CAP_AUDIT_WRITE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYSLOG",
+ .description_good = "Service has no access to kernel logging",
+ .description_bad = "Service has access to kernel logging",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYSLOG),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_(NICE|RESOURCE)",
+ .description_good = "Service has no privileges to change resource use parameters",
+ .description_bad = "Service has privileges to change resource use parameters",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_NICE) |
+ (UINT64_C(1) << CAP_SYS_RESOURCE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_MKNOD",
+ .description_good = "Service cannot create device nodes",
+ .description_bad = "Service may create device nodes",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_MKNOD),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_(CHOWN|FSETID|SETFCAP)",
+ .description_good = "Service cannot change file ownership/access mode/capabilities",
+ .description_bad = "Service may change file ownership/access mode/capabilities unrestricted",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_CHOWN) |
+ (UINT64_C(1) << CAP_FSETID) |
+ (UINT64_C(1) << CAP_SETFCAP),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_(DAC_*|FOWNER|IPC_OWNER)",
+ .description_good = "Service cannot override UNIX file/IPC permission checks",
+ .description_bad = "Service may override UNIX file/IPC permission checks",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_DAC_OVERRIDE) |
+ (UINT64_C(1) << CAP_DAC_READ_SEARCH) |
+ (UINT64_C(1) << CAP_FOWNER) |
+ (UINT64_C(1) << CAP_IPC_OWNER),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_KILL",
+ .description_good = "Service cannot send UNIX signals to arbitrary processes",
+ .description_bad = "Service may send UNIX signals to arbitrary processes",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_KILL),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_NET_(BIND_SERVICE|BROADCAST|RAW)",
+ .description_good = "Service has no elevated networking privileges",
+ .description_bad = "Service has elevated networking privileges",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_NET_BIND_SERVICE) |
+ (UINT64_C(1) << CAP_NET_BROADCAST) |
+ (UINT64_C(1) << CAP_NET_RAW),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_BOOT",
+ .description_good = "Service cannot issue reboot()",
+ .description_bad = "Service may issue reboot()",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_BOOT),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_MAC_*",
+ .description_good = "Service cannot adjust SMACK MAC",
+ .description_bad = "Service may adjust SMACK MAC",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_MAC_ADMIN)|
+ (UINT64_C(1) << CAP_MAC_OVERRIDE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_LINUX_IMMUTABLE",
+ .description_good = "Service cannot mark files immutable",
+ .description_bad = "Service may mark files immutable",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 75,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_LINUX_IMMUTABLE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_IPC_LOCK",
+ .description_good = "Service cannot lock memory into RAM",
+ .description_bad = "Service may lock memory into RAM",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 50,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_IPC_LOCK),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_CHROOT",
+ .description_good = "Service cannot issue chroot()",
+ .description_bad = "Service may issue chroot()",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 50,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_CHROOT),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_BLOCK_SUSPEND",
+ .description_good = "Service cannot establish wake locks",
+ .description_bad = "Service may establish wake locks",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 25,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_BLOCK_SUSPEND),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_WAKE_ALARM",
+ .description_good = "Service cannot program timers that wake up the system",
+ .description_bad = "Service may program timers that wake up the system",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 25,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_WAKE_ALARM),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_LEASE",
+ .description_good = "Service cannot create file leases",
+ .description_bad = "Service may create file leases",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 25,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_LEASE),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG",
+ .description_good = "Service cannot issue vhangup()",
+ .description_bad = "Service may issue vhangup()",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 25,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_TTY_CONFIG),
+ },
+ {
+ .id = "CapabilityBoundingSet=~CAP_SYS_PACCT",
+ .description_good = "Service cannot use acct()",
+ .description_bad = "Service may use acct()",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#CapabilityBoundingSet=",
+ .weight = 25,
+ .range = 1,
+ .assess = assess_capability_bounding_set,
+ .parameter = (UINT64_C(1) << CAP_SYS_PACCT),
+ },
+ {
+ .id = "UMask=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#UMask=",
+ .weight = 100,
+ .range = 10,
+ .assess = assess_umask,
+ },
+ {
+ .id = "KeyringMode=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#KeyringMode=",
+ .description_good = "Service doesn't share key material with other services",
+ .description_bad = "Service shares key material with other service",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_keyring_mode,
+ },
+ {
+ .id = "ProtectProc=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProtectProc=",
+ .description_good = "Service has restricted access to process tree (/proc hidepid=)",
+ .description_bad = "Service has full access to process tree (/proc hidepid=)",
+ .weight = 1000,
+ .range = 3,
+ .assess = assess_protect_proc,
+ },
+ {
+ .id = "ProcSubset=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#ProcSubset=",
+ .description_good = "Service has no access to non-process /proc files (/proc subset=)",
+ .description_bad = "Service has full access to non-process /proc files (/proc subset=)",
+ .weight = 10,
+ .range = 1,
+ .assess = assess_proc_subset,
+ },
+ {
+ .id = "NotifyAccess=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#NotifyAccess=",
+ .description_good = "Service child processes cannot alter service state",
+ .description_bad = "Service child processes may alter service state",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_notify_access,
+ },
+ {
+ .id = "RemoveIPC=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RemoveIPC=",
+ .description_good = "Service user cannot leave SysV IPC objects around",
+ .description_bad = "Service user may leave SysV IPC objects around",
+ .description_na = "Service runs as root, option does not apply",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_remove_ipc,
+ .offset = offsetof(struct security_info, remove_ipc),
+ },
+ {
+ .id = "Delegate=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#Delegate=",
+ .description_good = "Service does not maintain its own delegated control group subtree",
+ .description_bad = "Service maintains its own delegated control group subtree",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, delegate),
+ .parameter = true, /* invert! */
+ },
+ {
+ .id = "RestrictRealtime=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictRealtime=",
+ .description_good = "Service realtime scheduling access is restricted",
+ .description_bad = "Service may acquire realtime scheduling",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_realtime),
+ },
+ {
+ .id = "RestrictSUIDSGID=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictSUIDSGID=",
+ .description_good = "SUID/SGID file creation by service is restricted",
+ .description_bad = "Service may create SUID/SGID files",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_suid_sgid),
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWUSER",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create user namespaces",
+ .description_bad = "Service may create user namespaces",
+ .weight = 1500,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWUSER,
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWNS",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create file system namespaces",
+ .description_bad = "Service may create file system namespaces",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWNS,
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWIPC",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create IPC namespaces",
+ .description_bad = "Service may create IPC namespaces",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWIPC,
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWPID",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create process namespaces",
+ .description_bad = "Service may create process namespaces",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWPID,
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWCGROUP",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create cgroup namespaces",
+ .description_bad = "Service may create cgroup namespaces",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWCGROUP,
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWNET",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create network namespaces",
+ .description_bad = "Service may create network namespaces",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWNET,
+ },
+ {
+ .id = "RestrictNamespaces=~CLONE_NEWUTS",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictNamespaces=",
+ .description_good = "Service cannot create hostname namespaces",
+ .description_bad = "Service may create hostname namespaces",
+ .weight = 100,
+ .range = 1,
+ .assess = assess_restrict_namespaces,
+ .parameter = CLONE_NEWUTS,
+ },
+ {
+ .id = "RestrictAddressFamilies=~AF_(INET|INET6)",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictAddressFamilies=",
+ .description_good = "Service cannot allocate Internet sockets",
+ .description_bad = "Service may allocate Internet sockets",
+ .weight = 1500,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_address_family_inet),
+ },
+ {
+ .id = "RestrictAddressFamilies=~AF_UNIX",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictAddressFamilies=",
+ .description_good = "Service cannot allocate local sockets",
+ .description_bad = "Service may allocate local sockets",
+ .weight = 25,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_address_family_unix),
+ },
+ {
+ .id = "RestrictAddressFamilies=~AF_NETLINK",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictAddressFamilies=",
+ .description_good = "Service cannot allocate netlink sockets",
+ .description_bad = "Service may allocate netlink sockets",
+ .weight = 200,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_address_family_netlink),
+ },
+ {
+ .id = "RestrictAddressFamilies=~AF_PACKET",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictAddressFamilies=",
+ .description_good = "Service cannot allocate packet sockets",
+ .description_bad = "Service may allocate packet sockets",
+ .weight = 1000,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_address_family_packet),
+ },
+ {
+ .id = "RestrictAddressFamilies=~…",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RestrictAddressFamilies=",
+ .description_good = "Service cannot allocate exotic sockets",
+ .description_bad = "Service may allocate exotic sockets",
+ .weight = 1250,
+ .range = 1,
+ .assess = assess_bool,
+ .offset = offsetof(struct security_info, restrict_address_family_other),
+ },
+ {
+ .id = "SystemCallArchitectures=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallArchitectures=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_architectures,
+ },
+#if HAVE_SECCOMP
+ {
+ .id = "SystemCallFilter=~@swap",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_SWAP,
+ },
+ {
+ .id = "SystemCallFilter=~@obsolete",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 250,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_OBSOLETE,
+ },
+ {
+ .id = "SystemCallFilter=~@clock",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_CLOCK,
+ },
+ {
+ .id = "SystemCallFilter=~@cpu-emulation",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 250,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_CPU_EMULATION,
+ },
+ {
+ .id = "SystemCallFilter=~@debug",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_DEBUG,
+ },
+ {
+ .id = "SystemCallFilter=~@mount",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_MOUNT,
+ },
+ {
+ .id = "SystemCallFilter=~@module",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_MODULE,
+ },
+ {
+ .id = "SystemCallFilter=~@raw-io",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_RAW_IO,
+ },
+ {
+ .id = "SystemCallFilter=~@reboot",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_REBOOT,
+ },
+ {
+ .id = "SystemCallFilter=~@privileged",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 700,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_PRIVILEGED,
+ },
+ {
+ .id = "SystemCallFilter=~@resources",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#SystemCallFilter=",
+ .weight = 700,
+ .range = 10,
+ .assess = assess_system_call_filter,
+ .parameter = SYSCALL_FILTER_SET_RESOURCES,
+ },
+#endif
+ {
+ .id = "IPAddressDeny=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#IPAddressDeny=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_ip_address_allow,
+ },
+ {
+ .id = "DeviceAllow=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#DeviceAllow=",
+ .weight = 1000,
+ .range = 10,
+ .assess = assess_device_allow,
+ },
+ {
+ .id = "AmbientCapabilities=",
+ .url = "https://www.freedesktop.org/software/systemd/man/systemd.exec.html#AmbientCapabilities=",
+ .description_good = "Service process does not receive ambient capabilities",
+ .description_bad = "Service process receives ambient capabilities",
+ .weight = 500,
+ .range = 1,
+ .assess = assess_ambient_capabilities,
+ },
+};
+
+static int assess(const struct security_info *info, Table *overview_table, AnalyzeSecurityFlags flags) {
+ static const struct {
+ uint64_t exposure;
+ const char *name;
+ const char *color;
+ SpecialGlyph smiley;
+ } badness_table[] = {
+ { 100, "DANGEROUS", ANSI_HIGHLIGHT_RED, SPECIAL_GLYPH_DEPRESSED_SMILEY },
+ { 90, "UNSAFE", ANSI_HIGHLIGHT_RED, SPECIAL_GLYPH_UNHAPPY_SMILEY },
+ { 75, "EXPOSED", ANSI_HIGHLIGHT_YELLOW, SPECIAL_GLYPH_SLIGHTLY_UNHAPPY_SMILEY },
+ { 50, "MEDIUM", NULL, SPECIAL_GLYPH_NEUTRAL_SMILEY },
+ { 10, "OK", ANSI_HIGHLIGHT_GREEN, SPECIAL_GLYPH_SLIGHTLY_HAPPY_SMILEY },
+ { 1, "SAFE", ANSI_HIGHLIGHT_GREEN, SPECIAL_GLYPH_HAPPY_SMILEY },
+ { 0, "PERFECT", ANSI_HIGHLIGHT_GREEN, SPECIAL_GLYPH_ECSTATIC_SMILEY },
+ };
+
+ uint64_t badness_sum = 0, weight_sum = 0, exposure;
+ _cleanup_(table_unrefp) Table *details_table = NULL;
+ size_t i;
+ int r;
+
+ if (!FLAGS_SET(flags, ANALYZE_SECURITY_SHORT)) {
+ details_table = table_new(" ", "name", "description", "weight", "badness", "range", "exposure");
+ if (!details_table)
+ return log_oom();
+
+ (void) table_set_sort(details_table, (size_t) 3, (size_t) 1, (size_t) -1);
+ (void) table_set_reverse(details_table, 3, true);
+
+ if (getenv_bool("SYSTEMD_ANALYZE_DEBUG") <= 0)
+ (void) table_set_display(details_table, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 6, (size_t) -1);
+ }
+
+ for (i = 0; i < ELEMENTSOF(security_assessor_table); i++) {
+ const struct security_assessor *a = security_assessor_table + i;
+ _cleanup_free_ char *d = NULL;
+ uint64_t badness;
+ void *data;
+
+ data = (uint8_t *) info + a->offset;
+
+ if (a->default_dependencies_only && !info->default_dependencies) {
+ badness = UINT64_MAX;
+ d = strdup("Service runs in special boot phase, option does not apply");
+ if (!d)
+ return log_oom();
+ } else {
+ r = a->assess(a, info, data, &badness, &d);
+ if (r < 0)
+ return r;
+ }
+
+ assert(a->range > 0);
+
+ if (badness != UINT64_MAX) {
+ assert(badness <= a->range);
+
+ badness_sum += DIV_ROUND_UP(badness * a->weight, a->range);
+ weight_sum += a->weight;
+ }
+
+ if (details_table) {
+ const char *checkmark, *description, *color = NULL;
+
+ if (badness == UINT64_MAX) {
+ checkmark = " ";
+ description = a->description_na;
+ color = NULL;
+ } else if (badness == a->range) {
+ checkmark = special_glyph(SPECIAL_GLYPH_CROSS_MARK);
+ description = a->description_bad;
+ color = ansi_highlight_red();
+ } else if (badness == 0) {
+ checkmark = special_glyph(SPECIAL_GLYPH_CHECK_MARK);
+ description = a->description_good;
+ color = ansi_highlight_green();
+ } else {
+ checkmark = special_glyph(SPECIAL_GLYPH_CROSS_MARK);
+ description = NULL;
+ color = ansi_highlight_red();
+ }
+
+ if (d)
+ description = d;
+
+ r = table_add_many(details_table,
+ TABLE_STRING, checkmark,
+ TABLE_SET_MINIMUM_WIDTH, 1,
+ TABLE_SET_MAXIMUM_WIDTH, 1,
+ TABLE_SET_ELLIPSIZE_PERCENT, 0,
+ TABLE_SET_COLOR, color,
+ TABLE_STRING, a->id, TABLE_SET_URL, a->url,
+ TABLE_STRING, description,
+ TABLE_UINT64, a->weight, TABLE_SET_ALIGN_PERCENT, 100,
+ TABLE_UINT64, badness, TABLE_SET_ALIGN_PERCENT, 100,
+ TABLE_UINT64, a->range, TABLE_SET_ALIGN_PERCENT, 100,
+ TABLE_EMPTY, TABLE_SET_ALIGN_PERCENT, 100);
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+ }
+
+ assert(weight_sum > 0);
+
+ if (details_table) {
+ size_t row;
+
+ for (row = 1; row < table_get_rows(details_table); row++) {
+ char buf[DECIMAL_STR_MAX(uint64_t) + 1 + DECIMAL_STR_MAX(uint64_t) + 1];
+ const uint64_t *weight, *badness, *range;
+ TableCell *cell;
+ uint64_t x;
+
+ assert_se(weight = table_get_at(details_table, row, 3));
+ assert_se(badness = table_get_at(details_table, row, 4));
+ assert_se(range = table_get_at(details_table, row, 5));
+
+ if (*badness == UINT64_MAX || *badness == 0)
+ continue;
+
+ assert_se(cell = table_get_cell(details_table, row, 6));
+
+ x = DIV_ROUND_UP(DIV_ROUND_UP(*badness * *weight * 100U, *range), weight_sum);
+ xsprintf(buf, "%" PRIu64 ".%" PRIu64, x / 10, x % 10);
+
+ r = table_update(details_table, cell, TABLE_STRING, buf);
+ if (r < 0)
+ return log_error_errno(r, "Failed to update cell in table: %m");
+ }
+
+ r = table_print(details_table, stdout);
+ if (r < 0)
+ return log_error_errno(r, "Failed to output table: %m");
+ }
+
+ exposure = DIV_ROUND_UP(badness_sum * 100U, weight_sum);
+
+ for (i = 0; i < ELEMENTSOF(badness_table); i++)
+ if (exposure >= badness_table[i].exposure)
+ break;
+
+ assert(i < ELEMENTSOF(badness_table));
+
+ if (details_table) {
+ _cleanup_free_ char *clickable = NULL;
+ const char *name;
+
+ /* If we shall output the details table, also print the brief summary underneath */
+
+ if (info->fragment_path) {
+ r = terminal_urlify_path(info->fragment_path, info->id, &clickable);
+ if (r < 0)
+ return log_oom();
+
+ name = clickable;
+ } else
+ name = info->id;
+
+ printf("\n%s %sOverall exposure level for %s%s: %s%" PRIu64 ".%" PRIu64 " %s%s %s\n",
+ special_glyph(SPECIAL_GLYPH_ARROW),
+ ansi_highlight(),
+ name,
+ ansi_normal(),
+ colors_enabled() ? strempty(badness_table[i].color) : "",
+ exposure / 10, exposure % 10,
+ badness_table[i].name,
+ ansi_normal(),
+ special_glyph(badness_table[i].smiley));
+ }
+
+ fflush(stdout);
+
+ if (overview_table) {
+ char buf[DECIMAL_STR_MAX(uint64_t) + 1 + DECIMAL_STR_MAX(uint64_t) + 1];
+ _cleanup_free_ char *url = NULL;
+
+ if (info->fragment_path) {
+ r = file_url_from_path(info->fragment_path, &url);
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate URL from path: %m");
+ }
+
+ xsprintf(buf, "%" PRIu64 ".%" PRIu64, exposure / 10, exposure % 10);
+
+ r = table_add_many(overview_table,
+ TABLE_STRING, info->id,
+ TABLE_SET_URL, url,
+ TABLE_STRING, buf,
+ TABLE_SET_ALIGN_PERCENT, 100,
+ TABLE_STRING, badness_table[i].name,
+ TABLE_SET_COLOR, strempty(badness_table[i].color),
+ TABLE_STRING, special_glyph(badness_table[i].smiley));
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+
+ return 0;
+}
+
+static int property_read_restrict_address_families(
+ sd_bus *bus,
+ const char *member,
+ sd_bus_message *m,
+ sd_bus_error *error,
+ void *userdata) {
+
+ struct security_info *info = userdata;
+ int allow_list, r;
+
+ assert(bus);
+ assert(member);
+ assert(m);
+
+ r = sd_bus_message_enter_container(m, 'r', "bas");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(m, "b", &allow_list);
+ if (r < 0)
+ return r;
+
+ info->restrict_address_family_inet =
+ info->restrict_address_family_unix =
+ info->restrict_address_family_netlink =
+ info->restrict_address_family_packet =
+ info->restrict_address_family_other = allow_list;
+
+ r = sd_bus_message_enter_container(m, 'a', "s");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const char *name;
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ if (STR_IN_SET(name, "AF_INET", "AF_INET6"))
+ info->restrict_address_family_inet = !allow_list;
+ else if (streq(name, "AF_UNIX"))
+ info->restrict_address_family_unix = !allow_list;
+ else if (streq(name, "AF_NETLINK"))
+ info->restrict_address_family_netlink = !allow_list;
+ else if (streq(name, "AF_PACKET"))
+ info->restrict_address_family_packet = !allow_list;
+ else
+ info->restrict_address_family_other = !allow_list;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return sd_bus_message_exit_container(m);
+}
+
+static int property_read_system_call_filter(
+ sd_bus *bus,
+ const char *member,
+ sd_bus_message *m,
+ sd_bus_error *error,
+ void *userdata) {
+
+ struct security_info *info = userdata;
+ int allow_list, r;
+
+ assert(bus);
+ assert(member);
+ assert(m);
+
+ r = sd_bus_message_enter_container(m, 'r', "bas");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(m, "b", &allow_list);
+ if (r < 0)
+ return r;
+
+ info->system_call_filter_allow_list = allow_list;
+
+ r = sd_bus_message_enter_container(m, 'a', "s");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const char *name;
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = set_put_strdup(&info->system_call_filter, name);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return sd_bus_message_exit_container(m);
+}
+
+static int property_read_ip_address_allow(
+ sd_bus *bus,
+ const char *member,
+ sd_bus_message *m,
+ sd_bus_error *error,
+ void *userdata) {
+
+ struct security_info *info = userdata;
+ bool deny_ipv4 = false, deny_ipv6 = false;
+ int r;
+
+ assert(bus);
+ assert(member);
+ assert(m);
+
+ r = sd_bus_message_enter_container(m, 'a', "(iayu)");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const void *data;
+ size_t size;
+ int32_t family;
+ uint32_t prefixlen;
+
+ r = sd_bus_message_enter_container(m, 'r', "iayu");
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = sd_bus_message_read(m, "i", &family);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read_array(m, 'y', &data, &size);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(m, "u", &prefixlen);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ if (streq(member, "IPAddressAllow")) {
+ union in_addr_union u;
+
+ if (family == AF_INET && size == 4 && prefixlen == 8)
+ memcpy(&u.in, data, size);
+ else if (family == AF_INET6 && size == 16 && prefixlen == 128)
+ memcpy(&u.in6, data, size);
+ else {
+ info->ip_address_allow_other = true;
+ continue;
+ }
+
+ if (in_addr_is_localhost(family, &u))
+ info->ip_address_allow_localhost = true;
+ else
+ info->ip_address_allow_other = true;
+ } else {
+ assert(streq(member, "IPAddressDeny"));
+
+ if (family == AF_INET && size == 4 && prefixlen == 0)
+ deny_ipv4 = true;
+ else if (family == AF_INET6 && size == 16 && prefixlen == 0)
+ deny_ipv6 = true;
+ }
+ }
+
+ info->ip_address_deny_all = deny_ipv4 && deny_ipv6;
+
+ return sd_bus_message_exit_container(m);
+}
+
+static int property_read_ip_filters(
+ sd_bus *bus,
+ const char *member,
+ sd_bus_message *m,
+ sd_bus_error *error,
+ void *userdata) {
+
+ struct security_info *info = userdata;
+ _cleanup_(strv_freep) char **l = NULL;
+ int r;
+
+ assert(bus);
+ assert(member);
+ assert(m);
+
+ r = sd_bus_message_read_strv(m, &l);
+ if (r < 0)
+ return r;
+
+ if (streq(member, "IPIngressFilterPath"))
+ info->ip_filters_custom_ingress = !strv_isempty(l);
+ else if (streq(member, "IPEgressFilterPath"))
+ info->ip_filters_custom_ingress = !strv_isempty(l);
+
+ return 0;
+}
+
+static int property_read_device_allow(
+ sd_bus *bus,
+ const char *member,
+ sd_bus_message *m,
+ sd_bus_error *error,
+ void *userdata) {
+
+ struct security_info *info = userdata;
+ size_t n = 0;
+ int r;
+
+ assert(bus);
+ assert(member);
+ assert(m);
+
+ r = sd_bus_message_enter_container(m, 'a', "(ss)");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const char *name, *policy;
+
+ r = sd_bus_message_read(m, "(ss)", &name, &policy);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ n++;
+ }
+
+ info->device_allow_non_empty = n > 0;
+
+ return sd_bus_message_exit_container(m);
+}
+
+static int acquire_security_info(sd_bus *bus, const char *name, struct security_info *info, AnalyzeSecurityFlags flags) {
+
+ static const struct bus_properties_map security_map[] = {
+ { "AmbientCapabilities", "t", NULL, offsetof(struct security_info, ambient_capabilities) },
+ { "CapabilityBoundingSet", "t", NULL, offsetof(struct security_info, capability_bounding_set) },
+ { "DefaultDependencies", "b", NULL, offsetof(struct security_info, default_dependencies) },
+ { "Delegate", "b", NULL, offsetof(struct security_info, delegate) },
+ { "DeviceAllow", "a(ss)", property_read_device_allow, 0 },
+ { "DevicePolicy", "s", NULL, offsetof(struct security_info, device_policy) },
+ { "DynamicUser", "b", NULL, offsetof(struct security_info, dynamic_user) },
+ { "FragmentPath", "s", NULL, offsetof(struct security_info, fragment_path) },
+ { "IPAddressAllow", "a(iayu)", property_read_ip_address_allow, 0 },
+ { "IPAddressDeny", "a(iayu)", property_read_ip_address_allow, 0 },
+ { "IPIngressFilterPath", "as", property_read_ip_filters, 0 },
+ { "IPEgressFilterPath", "as", property_read_ip_filters, 0 },
+ { "Id", "s", NULL, offsetof(struct security_info, id) },
+ { "KeyringMode", "s", NULL, offsetof(struct security_info, keyring_mode) },
+ { "ProtectProc", "s", NULL, offsetof(struct security_info, protect_proc) },
+ { "ProcSubset", "s", NULL, offsetof(struct security_info, proc_subset) },
+ { "LoadState", "s", NULL, offsetof(struct security_info, load_state) },
+ { "LockPersonality", "b", NULL, offsetof(struct security_info, lock_personality) },
+ { "MemoryDenyWriteExecute", "b", NULL, offsetof(struct security_info, memory_deny_write_execute) },
+ { "NoNewPrivileges", "b", NULL, offsetof(struct security_info, no_new_privileges) },
+ { "NotifyAccess", "s", NULL, offsetof(struct security_info, notify_access) },
+ { "PrivateDevices", "b", NULL, offsetof(struct security_info, private_devices) },
+ { "PrivateMounts", "b", NULL, offsetof(struct security_info, private_mounts) },
+ { "PrivateNetwork", "b", NULL, offsetof(struct security_info, private_network) },
+ { "PrivateTmp", "b", NULL, offsetof(struct security_info, private_tmp) },
+ { "PrivateUsers", "b", NULL, offsetof(struct security_info, private_users) },
+ { "ProtectControlGroups", "b", NULL, offsetof(struct security_info, protect_control_groups) },
+ { "ProtectHome", "s", NULL, offsetof(struct security_info, protect_home) },
+ { "ProtectHostname", "b", NULL, offsetof(struct security_info, protect_hostname) },
+ { "ProtectKernelModules", "b", NULL, offsetof(struct security_info, protect_kernel_modules) },
+ { "ProtectKernelTunables", "b", NULL, offsetof(struct security_info, protect_kernel_tunables) },
+ { "ProtectKernelLogs", "b", NULL, offsetof(struct security_info, protect_kernel_logs) },
+ { "ProtectClock", "b", NULL, offsetof(struct security_info, protect_clock) },
+ { "ProtectSystem", "s", NULL, offsetof(struct security_info, protect_system) },
+ { "RemoveIPC", "b", NULL, offsetof(struct security_info, remove_ipc) },
+ { "RestrictAddressFamilies", "(bas)", property_read_restrict_address_families, 0 },
+ { "RestrictNamespaces", "t", NULL, offsetof(struct security_info, restrict_namespaces) },
+ { "RestrictRealtime", "b", NULL, offsetof(struct security_info, restrict_realtime) },
+ { "RestrictSUIDSGID", "b", NULL, offsetof(struct security_info, restrict_suid_sgid) },
+ { "RootDirectory", "s", NULL, offsetof(struct security_info, root_directory) },
+ { "RootImage", "s", NULL, offsetof(struct security_info, root_image) },
+ { "SupplementaryGroups", "as", NULL, offsetof(struct security_info, supplementary_groups) },
+ { "SystemCallArchitectures", "as", NULL, offsetof(struct security_info, system_call_architectures) },
+ { "SystemCallFilter", "(as)", property_read_system_call_filter, 0 },
+ { "Type", "s", NULL, offsetof(struct security_info, type) },
+ { "UMask", "u", NULL, offsetof(struct security_info, _umask) },
+ { "User", "s", NULL, offsetof(struct security_info, user) },
+ {}
+ };
+
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_free_ char *path = NULL;
+ int r;
+
+ /* Note: this mangles *info on failure! */
+
+ assert(bus);
+ assert(name);
+ assert(info);
+
+ path = unit_dbus_path_from_name(name);
+ if (!path)
+ return log_oom();
+
+ r = bus_map_all_properties(
+ bus,
+ "org.freedesktop.systemd1",
+ path,
+ security_map,
+ BUS_MAP_STRDUP | BUS_MAP_BOOLEAN_AS_BOOL,
+ &error,
+ NULL,
+ info);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get unit properties: %s", bus_error_message(&error, r));
+
+ if (!streq_ptr(info->load_state, "loaded")) {
+
+ if (FLAGS_SET(flags, ANALYZE_SECURITY_ONLY_LOADED))
+ return -EMEDIUMTYPE;
+
+ if (streq_ptr(info->load_state, "not-found"))
+ log_error("Unit %s not found, cannot analyze.", name);
+ else if (streq_ptr(info->load_state, "masked"))
+ log_error("Unit %s is masked, cannot analyze.", name);
+ else
+ log_error("Unit %s not loaded properly, cannot analyze.", name);
+
+ return -EINVAL;
+ }
+
+ if (FLAGS_SET(flags, ANALYZE_SECURITY_ONLY_LONG_RUNNING) && streq_ptr(info->type, "oneshot"))
+ return -EMEDIUMTYPE;
+
+ if (info->private_devices ||
+ info->private_tmp ||
+ info->protect_control_groups ||
+ info->protect_kernel_tunables ||
+ info->protect_kernel_modules ||
+ !streq_ptr(info->protect_home, "no") ||
+ !streq_ptr(info->protect_system, "no") ||
+ info->root_image)
+ info->private_mounts = true;
+
+ if (info->protect_kernel_modules)
+ info->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE);
+
+ if (info->protect_kernel_logs)
+ info->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYSLOG);
+
+ if (info->protect_clock)
+ info->capability_bounding_set &= ~((UINT64_C(1) << CAP_SYS_TIME) |
+ (UINT64_C(1) << CAP_WAKE_ALARM));
+
+ if (info->private_devices)
+ info->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) |
+ (UINT64_C(1) << CAP_SYS_RAWIO));
+
+ return 0;
+}
+
+static int analyze_security_one(sd_bus *bus, const char *name, Table *overview_table, AnalyzeSecurityFlags flags) {
+ _cleanup_(security_info_free) struct security_info info = {
+ .default_dependencies = true,
+ .capability_bounding_set = UINT64_MAX,
+ .restrict_namespaces = UINT64_MAX,
+ ._umask = 0002,
+ };
+ int r;
+
+ assert(bus);
+ assert(name);
+
+ r = acquire_security_info(bus, name, &info, flags);
+ if (r == -EMEDIUMTYPE) /* Ignore this one because not loaded or Type is oneshot */
+ return 0;
+ if (r < 0)
+ return r;
+
+ r = assess(&info, overview_table, flags);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int analyze_security(sd_bus *bus, char **units, AnalyzeSecurityFlags flags) {
+ _cleanup_(table_unrefp) Table *overview_table = NULL;
+ int ret = 0, r;
+
+ assert(bus);
+
+ if (strv_length(units) != 1) {
+ overview_table = table_new("unit", "exposure", "predicate", "happy");
+ if (!overview_table)
+ return log_oom();
+ }
+
+ if (strv_isempty(units)) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_strv_free_ char **list = NULL;
+ size_t allocated = 0, n = 0;
+ char **i;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "ListUnits",
+ &error,
+ &reply,
+ NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to list units: %s", bus_error_message(&error, r));
+
+ r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssssouso)");
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ for (;;) {
+ UnitInfo info;
+ char *copy = NULL;
+
+ r = bus_parse_unit_info(reply, &info);
+ if (r < 0)
+ return bus_log_parse_error(r);
+ if (r == 0)
+ break;
+
+ if (!endswith(info.id, ".service"))
+ continue;
+
+ if (!GREEDY_REALLOC(list, allocated, n + 2))
+ return log_oom();
+
+ copy = strdup(info.id);
+ if (!copy)
+ return log_oom();
+
+ list[n++] = copy;
+ list[n] = NULL;
+ }
+
+ strv_sort(list);
+
+ flags |= ANALYZE_SECURITY_SHORT|ANALYZE_SECURITY_ONLY_LOADED|ANALYZE_SECURITY_ONLY_LONG_RUNNING;
+
+ STRV_FOREACH(i, list) {
+ r = analyze_security_one(bus, *i, overview_table, flags);
+ if (r < 0 && ret >= 0)
+ ret = r;
+ }
+
+ } else {
+ char **i;
+
+ STRV_FOREACH(i, units) {
+ _cleanup_free_ char *mangled = NULL, *instance = NULL;
+ const char *name;
+
+ if (!FLAGS_SET(flags, ANALYZE_SECURITY_SHORT) && i != units) {
+ putc('\n', stdout);
+ fflush(stdout);
+ }
+
+ r = unit_name_mangle(*i, 0, &mangled);
+ if (r < 0)
+ return log_error_errno(r, "Failed to mangle unit name '%s': %m", *i);
+
+ if (!endswith(mangled, ".service"))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Unit %s is not a service unit, refusing.",
+ *i);
+
+ if (unit_name_is_valid(mangled, UNIT_NAME_TEMPLATE)) {
+ r = unit_name_replace_instance(mangled, "test-instance", &instance);
+ if (r < 0)
+ return log_oom();
+
+ name = instance;
+ } else
+ name = mangled;
+
+ r = analyze_security_one(bus, name, overview_table, flags);
+ if (r < 0 && ret >= 0)
+ ret = r;
+ }
+ }
+
+ if (overview_table) {
+ if (!FLAGS_SET(flags, ANALYZE_SECURITY_SHORT)) {
+ putc('\n', stdout);
+ fflush(stdout);
+ }
+
+ r = table_print(overview_table, stdout);
+ if (r < 0)
+ return log_error_errno(r, "Failed to output table: %m");
+ }
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 04:31:29 +0000