140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2021-2022 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 <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <regex.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#if defined(HAVE_STDINT_H)
|
|
# include <stdint.h>
|
|
#elif defined(HAVE_INTTYPES_H)
|
|
# include <inttypes.h>
|
|
#endif
|
|
|
|
#include "sudo_compat.h"
|
|
#include "sudo_conf.h"
|
|
#include "sudo_debug.h"
|
|
#include "sudo_eventlog.h"
|
|
#include "sudo_fatal.h"
|
|
#include "sudo_iolog.h"
|
|
#include "sudo_plugin.h"
|
|
#include "sudo_util.h"
|
|
|
|
#include "logsrvd.h"
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
|
|
|
|
/*
|
|
* Stub version that always succeeds for small inputs and fails for large.
|
|
* We want to fuzz our parser, not libc's regular expression code.
|
|
*/
|
|
bool
|
|
sudo_regex_compile_v1(void *v, const char *pattern, const char **errstr)
|
|
{
|
|
regex_t *preg = v;
|
|
|
|
if (strlen(pattern) > 32) {
|
|
*errstr = "invalid regular expression";
|
|
return false;
|
|
}
|
|
|
|
/* hopefully avoid regfree() crashes */
|
|
memset(preg, 0, sizeof(*preg));
|
|
return true;
|
|
}
|
|
|
|
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)
|
|
{
|
|
char tempfile[] = "/tmp/logsrvd_conf.XXXXXX";
|
|
size_t nwritten;
|
|
int fd;
|
|
|
|
setprogname("fuzz_logsrvd_conf");
|
|
if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
|
|
sudo_warn_set_conversation(fuzz_conversation);
|
|
|
|
/* logsrvd_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);
|
|
|
|
if (logsrvd_conf_read(tempfile)) {
|
|
/* public config getters */
|
|
logsrvd_conf_iolog_dir();
|
|
logsrvd_conf_iolog_file();
|
|
logsrvd_conf_iolog_mode();
|
|
logsrvd_conf_pid_file();
|
|
logsrvd_conf_relay_address();
|
|
logsrvd_conf_relay_connect_timeout();
|
|
logsrvd_conf_relay_tcp_keepalive();
|
|
logsrvd_conf_relay_timeout();
|
|
logsrvd_conf_server_listen_address();
|
|
logsrvd_conf_server_tcp_keepalive();
|
|
logsrvd_conf_server_timeout();
|
|
|
|
/* free config */
|
|
logsrvd_conf_cleanup();
|
|
}
|
|
|
|
unlink(tempfile);
|
|
|
|
fflush(stdout);
|
|
|
|
return 0;
|
|
}
|