diff options
Diffstat (limited to 'lib/util/regress/fuzz/fuzz_sudo_conf.c')
| -rw-r--r-- | lib/util/regress/fuzz/fuzz_sudo_conf.c | 149 |
1 files changed, 149 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; +} |