Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/libdeflate-1.6/common/common_defs.h
Examining data/libdeflate-1.6/common/compiler_gcc.h
Examining data/libdeflate-1.6/common/compiler_msc.h
Examining data/libdeflate-1.6/lib/adler32.c
Examining data/libdeflate-1.6/lib/adler32_vec_template.h
Examining data/libdeflate-1.6/lib/arm/adler32_impl.h
Examining data/libdeflate-1.6/lib/arm/cpu_features.c
Examining data/libdeflate-1.6/lib/arm/cpu_features.h
Examining data/libdeflate-1.6/lib/arm/crc32_impl.h
Examining data/libdeflate-1.6/lib/arm/matchfinder_impl.h
Examining data/libdeflate-1.6/lib/bt_matchfinder.h
Examining data/libdeflate-1.6/lib/crc32.c
Examining data/libdeflate-1.6/lib/crc32_table.h
Examining data/libdeflate-1.6/lib/crc32_vec_template.h
Examining data/libdeflate-1.6/lib/decompress_template.h
Examining data/libdeflate-1.6/lib/deflate_compress.c
Examining data/libdeflate-1.6/lib/deflate_compress.h
Examining data/libdeflate-1.6/lib/deflate_constants.h
Examining data/libdeflate-1.6/lib/deflate_decompress.c
Examining data/libdeflate-1.6/lib/gzip_compress.c
Examining data/libdeflate-1.6/lib/gzip_constants.h
Examining data/libdeflate-1.6/lib/gzip_decompress.c
Examining data/libdeflate-1.6/lib/hc_matchfinder.h
Examining data/libdeflate-1.6/lib/lib_common.h
Examining data/libdeflate-1.6/lib/matchfinder_common.h
Examining data/libdeflate-1.6/lib/unaligned.h
Examining data/libdeflate-1.6/lib/utils.c
Examining data/libdeflate-1.6/lib/x86/adler32_impl.h
Examining data/libdeflate-1.6/lib/x86/cpu_features.c
Examining data/libdeflate-1.6/lib/x86/cpu_features.h
Examining data/libdeflate-1.6/lib/x86/crc32_impl.h
Examining data/libdeflate-1.6/lib/x86/crc32_pclmul_template.h
Examining data/libdeflate-1.6/lib/x86/decompress_impl.h
Examining data/libdeflate-1.6/lib/x86/matchfinder_impl.h
Examining data/libdeflate-1.6/lib/zlib_compress.c
Examining data/libdeflate-1.6/lib/zlib_constants.h
Examining data/libdeflate-1.6/lib/zlib_decompress.c
Examining data/libdeflate-1.6/libdeflate.h
Examining data/libdeflate-1.6/programs/benchmark.c
Examining data/libdeflate-1.6/programs/checksum.c
Examining data/libdeflate-1.6/programs/gzip.c
Examining data/libdeflate-1.6/programs/prog_util.c
Examining data/libdeflate-1.6/programs/prog_util.h
Examining data/libdeflate-1.6/programs/test_checksums.c
Examining data/libdeflate-1.6/programs/test_custom_malloc.c
Examining data/libdeflate-1.6/programs/test_incomplete_codes.c
Examining data/libdeflate-1.6/programs/test_slow_decompression.c
Examining data/libdeflate-1.6/programs/test_trailing_bytes.c
Examining data/libdeflate-1.6/programs/test_util.c
Examining data/libdeflate-1.6/programs/test_util.h
Examining data/libdeflate-1.6/programs/tgetopt.c
Examining data/libdeflate-1.6/tools/afl-fuzz/deflate_compress/fuzz.c
Examining data/libdeflate-1.6/tools/afl-fuzz/deflate_decompress/fuzz.c
Examining data/libdeflate-1.6/tools/afl-fuzz/gzip_decompress/fuzz.c
Examining data/libdeflate-1.6/tools/afl-fuzz/zlib_decompress/fuzz.c
Examining data/libdeflate-1.6/tools/gen_crc32_multipliers.c
Examining data/libdeflate-1.6/tools/gen_crc32_table.c
FINAL RESULTS:
data/libdeflate-1.6/programs/benchmark.c:352:3: [4] (format) fprintf:
If format strings can be influenced by an attacker, they can be exploited
(CWE-134). Use a constant for the format specification.
fprintf(fp, "%"TS, all_engines[i]->name);
data/libdeflate-1.6/programs/prog_util.c:65:2: [4] (format) vfprintf:
If format strings can be influenced by an attacker, they can be exploited
(CWE-134). Use a constant for the format specification.
vfprintf(stderr, format, va);
data/libdeflate-1.6/programs/prog_util.h:46:25: [4] (format) printf:
If format strings can be influenced by an attacker, they can be exploited
(CWE-134). Use a constant for the format specification.
__attribute__((format(printf, str_idx, args_idx)))
data/libdeflate-1.6/programs/test_checksums.c:159:2: [3] (random) srand:
This function is not sufficiently random for security-related functions
such as key and nonce creation (CWE-327). Use a more secure technique for
acquiring random values.
srand(rng_seed);
data/libdeflate-1.6/programs/test_util.c:65:6: [3] (buffer) getenv:
Environment variables are untrustable input if they can be set by an
attacker. They can have any content and length, and the same variable can
be set more than once (CWE-807, CWE-20). Check environment variables
carefully before using them.
if (getenv("INCLUDE_PERF_TESTS") == NULL) {
data/libdeflate-1.6/lib/arm/cpu_features.c:59:7: [2] (misc) open:
Check when opening files - can an attacker redirect it (via symlinks),
force the opening of special file type (e.g., device files), move things
around to create a race condition, control its ancestors, or change its
contents? (CWE-362).
fd = open("/proc/self/auxv", O_RDONLY);
data/libdeflate-1.6/lib/arm/cpu_features.c:65:26: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
int ret = read(fd, &((char *)auxbuf)[filled],
data/libdeflate-1.6/lib/decompress_template.h:205:3: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(out_next, in_next, len);
data/libdeflate-1.6/lib/deflate_compress.c:1673:2: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(os->next, data, len);
data/libdeflate-1.6/lib/deflate_decompress.c:707:6: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(&decode_table[cur_table_end],
data/libdeflate-1.6/lib/deflate_decompress.c:738:5: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(&decode_table[cur_table_end],
data/libdeflate-1.6/lib/lib_common.h:55:7: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
void *memcpy(void *dest, const void *src, size_t n);
data/libdeflate-1.6/lib/lib_common.h:56:9: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
#define memcpy(dest, src, n) __builtin_memcpy((dest), (src), (n))
data/libdeflate-1.6/lib/unaligned.h:40:2: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(p, &v, sizeof(v)); \
data/libdeflate-1.6/lib/utils.c:98:8: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
#undef memcpy
data/libdeflate-1.6/lib/utils.c:99:7: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
void *memcpy(void *dest, const void *src, size_t n)
data/libdeflate-1.6/lib/utils.c:118:10: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
return memcpy(d, s, n);
data/libdeflate-1.6/programs/prog_util.h:119:20: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
# define tmemcpy memcpy
data/libdeflate-1.6/programs/prog_util.h:120:18: [2] (misc) open:
Check when opening files - can an attacker redirect it (via symlinks),
force the opening of special file type (e.g., device files), move things
around to create a race condition, control its ancestors, or change its
contents? (CWE-362).
# define topen open
data/libdeflate-1.6/programs/test_checksums.c:142:3: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(guarded_buf_end - len, &buffer[start], len);
data/libdeflate-1.6/tools/afl-fuzz/deflate_compress/fuzz.c:13:11: [2] (misc) open:
Check when opening files - can an attacker redirect it (via symlinks),
force the opening of special file type (e.g., device files), move things
around to create a race condition, control its ancestors, or change its
contents? (CWE-362).
int fd = open(argv[1], O_RDONLY);
data/libdeflate-1.6/tools/afl-fuzz/deflate_compress/fuzz.c:19:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char in[stbuf.st_size];
data/libdeflate-1.6/tools/afl-fuzz/deflate_compress/fuzz.c:26:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char out[sizeof(in)];
data/libdeflate-1.6/tools/afl-fuzz/deflate_compress/fuzz.c:27:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char checkarray[sizeof(in)];
data/libdeflate-1.6/tools/afl-fuzz/deflate_decompress/fuzz.c:11:11: [2] (misc) open:
Check when opening files - can an attacker redirect it (via symlinks),
force the opening of special file type (e.g., device files), move things
around to create a race condition, control its ancestors, or change its
contents? (CWE-362).
int fd = open(argv[1], O_RDONLY);
data/libdeflate-1.6/tools/afl-fuzz/deflate_decompress/fuzz.c:17:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char in[stbuf.st_size];
data/libdeflate-1.6/tools/afl-fuzz/deflate_decompress/fuzz.c:21:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char out[sizeof(in) * 3];
data/libdeflate-1.6/tools/afl-fuzz/gzip_decompress/fuzz.c:11:11: [2] (misc) open:
Check when opening files - can an attacker redirect it (via symlinks),
force the opening of special file type (e.g., device files), move things
around to create a race condition, control its ancestors, or change its
contents? (CWE-362).
int fd = open(argv[1], O_RDONLY);
data/libdeflate-1.6/tools/afl-fuzz/gzip_decompress/fuzz.c:17:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char in[stbuf.st_size];
data/libdeflate-1.6/tools/afl-fuzz/gzip_decompress/fuzz.c:21:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char out[sizeof(in) * 3];
data/libdeflate-1.6/tools/afl-fuzz/zlib_decompress/fuzz.c:11:11: [2] (misc) open:
Check when opening files - can an attacker redirect it (via symlinks),
force the opening of special file type (e.g., device files), move things
around to create a race condition, control its ancestors, or change its
contents? (CWE-362).
int fd = open(argv[1], O_RDONLY);
data/libdeflate-1.6/tools/afl-fuzz/zlib_decompress/fuzz.c:17:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char in[stbuf.st_size];
data/libdeflate-1.6/tools/afl-fuzz/zlib_decompress/fuzz.c:21:2: [2] (buffer) char:
Statically-sized arrays can be improperly restricted, leading to potential
overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
functions that limit length, or ensure that the size is larger than the
maximum possible length.
char out[sizeof(in) * 3];
data/libdeflate-1.6/lib/arm/cpu_features.c:65:14: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
int ret = read(fd, &((char *)auxbuf)[filled],
data/libdeflate-1.6/programs/prog_util.c:237:8: [1] (buffer) getchar:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
if (getchar() != 'y') {
data/libdeflate-1.6/programs/prog_util.c:370:17: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
ssize_t res = read(strm->fd, p, MIN(count, INT_MAX));
data/libdeflate-1.6/programs/prog_util.h:92:20: [1] (buffer) wcslen:
Does not handle strings that are not \0-terminated; if given one it may
perform an over-read (it could cause a crash if unprotected) (CWE-126).
# define tstrlen wcslen
data/libdeflate-1.6/programs/prog_util.h:123:20: [1] (buffer) strlen:
Does not handle strings that are not \0-terminated; if given one it may
perform an over-read (it could cause a crash if unprotected) (CWE-126).
# define tstrlen strlen
data/libdeflate-1.6/tools/afl-fuzz/deflate_compress/fuzz.c:20:8: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
ret = read(fd, in, sizeof in);
data/libdeflate-1.6/tools/afl-fuzz/deflate_decompress/fuzz.c:18:8: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
ret = read(fd, in, sizeof in);
data/libdeflate-1.6/tools/afl-fuzz/gzip_decompress/fuzz.c:18:8: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
ret = read(fd, in, sizeof in);
data/libdeflate-1.6/tools/afl-fuzz/zlib_decompress/fuzz.c:18:8: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
ret = read(fd, in, sizeof in);
ANALYSIS SUMMARY:
Hits = 42
Lines analyzed = 14036 in approximately 0.47 seconds (30117 lines/second)
Physical Source Lines of Code (SLOC) = 8447
Hits@level = [0] 59 [1] 9 [2] 28 [3] 2 [4] 3 [5] 0
Hits@level+ = [0+] 101 [1+] 42 [2+] 33 [3+] 5 [4+] 3 [5+] 0
Hits/KSLOC@level+ = [0+] 11.9569 [1+] 4.97218 [2+] 3.90671 [3+] 0.591926 [4+] 0.355156 [5+] 0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.