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-rw-r--r--lib/util/regress/fuzz/fuzz_sudo_conf.c149
-rw-r--r--lib/util/regress/fuzz/fuzz_sudo_conf.dict18
2 files changed, 167 insertions, 0 deletions
diff --git a/lib/util/regress/fuzz/fuzz_sudo_conf.c b/lib/util/regress/fuzz/fuzz_sudo_conf.c
new file mode 100644
index 0000000..4e70086
--- /dev/null
+++ b/lib/util/regress/fuzz/fuzz_sudo_conf.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#if defined(HAVE_STDINT_H)
+# include <stdint.h>
+#elif defined(HAVE_INTTYPES_H)
+# include <inttypes.h>
+#endif
+
+#define SUDO_ERROR_WRAP 0
+
+#include "sudo_compat.h"
+#include "sudo_conf.h"
+#include "sudo_debug.h"
+#include "sudo_fatal.h"
+#include "sudo_plugin.h"
+#include "sudo_util.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+static int
+fuzz_conversation(int num_msgs, const struct sudo_conv_message msgs[],
+ struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
+{
+ int n;
+
+ for (n = 0; n < num_msgs; n++) {
+ const struct sudo_conv_message *msg = &msgs[n];
+
+ switch (msg->msg_type & 0xff) {
+ case SUDO_CONV_PROMPT_ECHO_ON:
+ case SUDO_CONV_PROMPT_MASK:
+ case SUDO_CONV_PROMPT_ECHO_OFF:
+ /* input not supported */
+ return -1;
+ case SUDO_CONV_ERROR_MSG:
+ case SUDO_CONV_INFO_MSG:
+ /* no output for fuzzers */
+ break;
+ default:
+ return -1;
+ }
+ }
+ return 0;
+}
+
+int
+LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+ struct plugin_info_list *plugins = sudo_conf_plugins();
+ struct sudo_conf_debug_list *debug_list = sudo_conf_debugging();
+ struct sudo_conf_debug_file_list *debug_files;
+ char tempfile[] = "/tmp/sudo_conf.XXXXXX";
+ struct sudo_conf_debug *debug_spec;
+ struct sudo_debug_file *debug_file;
+ struct plugin_info *info;
+ size_t nwritten;
+ int fd;
+
+ initprogname("fuzz_sudo_conf");
+ if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
+ sudo_warn_set_conversation(fuzz_conversation);
+
+ /* sudo_conf_read() uses a conf file path, not an open file. */
+ fd = mkstemp(tempfile);
+ if (fd == -1)
+ return 0;
+ nwritten = write(fd, data, size);
+ if (nwritten != size) {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+
+ /* sudo_conf_read() will re-init and free old data each time it runs. */
+ sudo_conf_clear_paths();
+ sudo_conf_read(tempfile, SUDO_CONF_ALL);
+
+ /* Path settings. */
+ if (sudo_conf_askpass_path() != NULL)
+ sudo_warnx("Path askpass %s", sudo_conf_askpass_path());
+ if (sudo_conf_sesh_path() != NULL)
+ sudo_warnx("Path sesh %s", sudo_conf_sesh_path());
+ if (sudo_conf_intercept_path() != NULL)
+ sudo_warnx("Path intercept %s", sudo_conf_intercept_path());
+ if (sudo_conf_noexec_path() != NULL)
+ sudo_warnx("Path noexec %s", sudo_conf_noexec_path());
+ if (sudo_conf_plugin_dir_path() != NULL)
+ sudo_warnx("Path plugin_dir %s", sudo_conf_plugin_dir_path());
+
+ /* Other settings. */
+ sudo_warnx("Set disable_coredump %s",
+ sudo_conf_disable_coredump() ? "true" : "false");
+ sudo_warnx("Set group_source %s",
+ sudo_conf_group_source() == GROUP_SOURCE_ADAPTIVE ? "adaptive" :
+ sudo_conf_group_source() == GROUP_SOURCE_STATIC ? "static" : "dynamic");
+ sudo_warnx("Set max_groups %d", sudo_conf_max_groups());
+ sudo_warnx("Set probe_interfaces %s",
+ sudo_conf_probe_interfaces() ? "true" : "false");
+
+ /* Plugins. */
+ plugins = sudo_conf_plugins();
+ TAILQ_FOREACH(info, plugins, entries) {
+ /* We don't bother with the plugin options. */
+ sudo_warnx("Plugin %s %s", info->symbol_name, info->path);
+ }
+
+ /* Debug settings. */
+ debug_list = sudo_conf_debugging();
+ TAILQ_FOREACH(debug_spec, debug_list, entries) {
+ TAILQ_FOREACH(debug_file, &debug_spec->debug_files, entries) {
+ sudo_warnx("Debug %s %s %s", debug_spec->progname,
+ debug_file->debug_file, debug_file->debug_flags);
+ }
+ }
+
+ debug_files = sudo_conf_debug_files(getprogname());
+ if (debug_files != NULL) {
+ TAILQ_FOREACH(debug_file, debug_files, entries) {
+ sudo_warnx("Debug %s %s %s", getprogname(),
+ debug_file->debug_file, debug_file->debug_flags);
+ }
+ }
+
+ unlink(tempfile);
+
+ fflush(stdout);
+
+ return 0;
+}
diff --git a/lib/util/regress/fuzz/fuzz_sudo_conf.dict b/lib/util/regress/fuzz/fuzz_sudo_conf.dict
new file mode 100644
index 0000000..4b26917
--- /dev/null
+++ b/lib/util/regress/fuzz/fuzz_sudo_conf.dict
@@ -0,0 +1,18 @@
+# sudo.conf keywords
+"Debug"
+"Path"
+"Plugin"
+"Set"
+
+# Paths
+"askpass"
+"sesh"
+"noexec"
+"plugin_dir"
+"devsearch"
+
+# Variables
+"disable_coredump"
+"group_source"
+"max_groups"
+"probe_interfaces"