mirror of
https://github.com/Cisco-Talos/clamav.git
synced 2026-01-27 16:18:32 -05:00
2d99b49797
The fuzz targets that write a temp file currently use the same filename every time. One of the users identified that if the tests are running in parallel mode, many processes are accessing the same file. This results in unstable input to the API being tested, where the file may be overwritten as the function is being tested. This commit fixes it by putting the fuzz process PID in the filenames for the scanfile and dbload fuzz targets. Resolves: https://github.com/Cisco-Talos/clamav/issues/432 Also fixed a CMake bug that built an extra fuzz target file that doesn't serve any purpose. Resolves: https://github.com/Cisco-Talos/clamav/issues/431
151 lines
5.3 KiB
C++
151 lines
5.3 KiB
C++
/*
|
|
* Fuzz target for cl_load()
|
|
*
|
|
* Copyright (C) 2018-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
|
|
* Authors: Micah Snyder
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "clamav.h"
|
|
|
|
void clamav_message_callback(enum cl_msg severity, const char* fullmsg,
|
|
const char* msg, void* context)
|
|
{
|
|
}
|
|
|
|
class ClamAVState
|
|
{
|
|
public:
|
|
ClamAVState()
|
|
{
|
|
// Silence all the log messages, none of them are meaningful.
|
|
cl_set_clcb_msg(clamav_message_callback);
|
|
|
|
cl_init(CL_INIT_DEFAULT);
|
|
}
|
|
|
|
~ClamAVState()
|
|
{
|
|
}
|
|
};
|
|
|
|
// Global with static initializer to setup an engine so we don't need to do
|
|
// that on each execution.
|
|
ClamAVState kClamAVState;
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
|
|
{
|
|
cl_error_t ret;
|
|
char tmp_file_name[200] = {0};
|
|
unsigned int sigs = 0;
|
|
FILE* fuzzdb = NULL;
|
|
struct cl_engine* engine = NULL;
|
|
unsigned int dboptions;
|
|
|
|
__pid_t pid = getpid();
|
|
|
|
dboptions =
|
|
CL_DB_PHISHING | CL_DB_PHISHING_URLS |
|
|
CL_DB_BYTECODE | CL_DB_PUA | CL_DB_ENHANCED;
|
|
|
|
#if defined(CLAMAV_FUZZ_CDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.cdb", pid);
|
|
#elif defined(CLAMAV_FUZZ_CFG)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.cfg", pid);
|
|
#elif defined(CLAMAV_FUZZ_CRB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.crb", pid);
|
|
#elif defined(CLAMAV_FUZZ_FP)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.fp", pid);
|
|
#elif defined(CLAMAV_FUZZ_FTM)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ftm", pid);
|
|
#elif defined(CLAMAV_FUZZ_HDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.hdb", pid);
|
|
#elif defined(CLAMAV_FUZZ_HSB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.hsb", pid);
|
|
#elif defined(CLAMAV_FUZZ_IDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.idb", pid);
|
|
#elif defined(CLAMAV_FUZZ_IGN)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ign", pid);
|
|
#elif defined(CLAMAV_FUZZ_IGN2)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ign2", pid);
|
|
#elif defined(CLAMAV_FUZZ_LDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ldb", pid);
|
|
#elif defined(CLAMAV_FUZZ_MDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.mdb", pid);
|
|
#elif defined(CLAMAV_FUZZ_MSB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.msb", pid);
|
|
#elif defined(CLAMAV_FUZZ_NDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.ndb", pid);
|
|
#elif defined(CLAMAV_FUZZ_PDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.pdb", pid);
|
|
#elif defined(CLAMAV_FUZZ_WDB)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.wdb", pid);
|
|
#elif defined(CLAMAV_FUZZ_YARA)
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d.yara", pid);
|
|
#else
|
|
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.dbload.%d", pid);
|
|
#endif
|
|
|
|
fuzzdb = fopen(tmp_file_name, "w");
|
|
fwrite(data, size, 1, fuzzdb);
|
|
fclose(fuzzdb);
|
|
|
|
/* need new engine each time. can't add sigs to compiled engine */
|
|
engine = cl_engine_new();
|
|
|
|
/* load the fuzzer-generated sig db */
|
|
if (CL_SUCCESS != (ret = cl_load(tmp_file_name,
|
|
engine,
|
|
&sigs,
|
|
dboptions))) {
|
|
printf("cl_load: %s\n", cl_strerror(ret));
|
|
goto done;
|
|
}
|
|
|
|
/* build engine */
|
|
if (CL_SUCCESS != (ret = cl_engine_compile(engine))) {
|
|
printf("cl_engine_compile: %s\n", cl_strerror(ret));
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
|
|
/* Clean up for the next round */
|
|
if (NULL != engine) {
|
|
cl_engine_free(engine);
|
|
}
|
|
|
|
unlink(tmp_file_name);
|
|
|
|
return 0;
|
|
}
|