1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* Fuzz target for cl_scanfile()
*
* Copyright (C) 2018-2024 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
* Authors: Micah Snyder, Alex Gaynor
*
* 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 <string.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);
engine = cl_engine_new();
cl_engine_compile(engine);
memset(&scanopts, 0, sizeof(struct cl_scan_options));
#if defined(CLAMAV_FUZZ_ARCHIVE)
scanopts.parse |= CL_SCAN_PARSE_ARCHIVE;
#elif defined(CLAMAV_FUZZ_MAIL)
scanopts.parse |= CL_SCAN_PARSE_MAIL;
#elif defined(CLAMAV_FUZZ_OLE2)
scanopts.parse |= CL_SCAN_PARSE_OLE2;
#elif defined(CLAMAV_FUZZ_PDF)
scanopts.parse |= CL_SCAN_PARSE_PDF;
#elif defined(CLAMAV_FUZZ_HTML)
scanopts.parse |= CL_SCAN_PARSE_HTML;
#elif defined(CLAMAV_FUZZ_PE)
scanopts.parse |= CL_SCAN_PARSE_PE;
#elif defined(CLAMAV_FUZZ_ELF)
scanopts.parse |= CL_SCAN_PARSE_ELF;
#elif defined(CLAMAV_FUZZ_SWF)
scanopts.parse |= CL_SCAN_PARSE_SWF;
#elif defined(CLAMAV_FUZZ_XMLDOCS)
scanopts.parse |= CL_SCAN_PARSE_XMLDOCS;
#elif defined(CLAMAV_FUZZ_HWP3)
scanopts.parse |= CL_SCAN_PARSE_HWP3;
#else
scanopts.parse |= ~(0);
#endif
scanopts.general |= CL_SCAN_GENERAL_HEURISTICS;
scanopts.general |= CL_SCAN_GENERAL_COLLECT_METADATA; /* Enable the gen-json feature */
scanopts.heuristic |= ~(0); /* Enable all heuristic code */
scanopts.general |= CL_SCAN_GENERAL_ALLMATCHES; /* Enable all-match, so heuristic alerts don't end the scan early */
}
~ClamAVState()
{
cl_engine_free(engine);
}
struct cl_engine* engine;
struct cl_scan_options scanopts;
};
// 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)
{
FILE* fuzzfile = NULL;
char tmp_file_name[200] = {0};
__pid_t pid = getpid();
snprintf(tmp_file_name, sizeof(tmp_file_name), "tmp.scanfile.%d", pid);
fuzzfile = fopen(tmp_file_name, "w");
fwrite(data, size, 1, fuzzfile);
fclose(fuzzfile);
const char* virus_name = nullptr;
unsigned long scanned = 0;
cl_scanfile(
tmp_file_name,
&virus_name,
&scanned,
kClamAVState.engine,
&kClamAVState.scanopts);
unlink(tmp_file_name);
return 0;
}
|
