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/gumbo-parser-0.10.1+dfsg/benchmarks/benchmark.cc
Examining data/gumbo-parser-0.10.1+dfsg/examples/clean_text.cc
Examining data/gumbo-parser-0.10.1+dfsg/examples/find_links.cc
Examining data/gumbo-parser-0.10.1+dfsg/examples/get_title.c
Examining data/gumbo-parser-0.10.1+dfsg/examples/positions_of_class.cc
Examining data/gumbo-parser-0.10.1+dfsg/examples/prettyprint.cc
Examining data/gumbo-parser-0.10.1+dfsg/examples/serialize.cc
Examining data/gumbo-parser-0.10.1+dfsg/src/attribute.c
Examining data/gumbo-parser-0.10.1+dfsg/src/attribute.h
Examining data/gumbo-parser-0.10.1+dfsg/src/char_ref.c
Examining data/gumbo-parser-0.10.1+dfsg/src/char_ref.h
Examining data/gumbo-parser-0.10.1+dfsg/src/error.c
Examining data/gumbo-parser-0.10.1+dfsg/src/error.h
Examining data/gumbo-parser-0.10.1+dfsg/src/gumbo.h
Examining data/gumbo-parser-0.10.1+dfsg/src/insertion_mode.h
Examining data/gumbo-parser-0.10.1+dfsg/src/parser.c
Examining data/gumbo-parser-0.10.1+dfsg/src/parser.h
Examining data/gumbo-parser-0.10.1+dfsg/src/string_buffer.c
Examining data/gumbo-parser-0.10.1+dfsg/src/string_buffer.h
Examining data/gumbo-parser-0.10.1+dfsg/src/string_piece.c
Examining data/gumbo-parser-0.10.1+dfsg/src/string_piece.h
Examining data/gumbo-parser-0.10.1+dfsg/src/tag.c
Examining data/gumbo-parser-0.10.1+dfsg/src/tag_enum.h
Examining data/gumbo-parser-0.10.1+dfsg/src/tag_gperf.h
Examining data/gumbo-parser-0.10.1+dfsg/src/tag_sizes.h
Examining data/gumbo-parser-0.10.1+dfsg/src/tag_strings.h
Examining data/gumbo-parser-0.10.1+dfsg/src/token_type.h
Examining data/gumbo-parser-0.10.1+dfsg/src/tokenizer.c
Examining data/gumbo-parser-0.10.1+dfsg/src/tokenizer.h
Examining data/gumbo-parser-0.10.1+dfsg/src/tokenizer_states.h
Examining data/gumbo-parser-0.10.1+dfsg/src/utf8.c
Examining data/gumbo-parser-0.10.1+dfsg/src/utf8.h
Examining data/gumbo-parser-0.10.1+dfsg/src/util.c
Examining data/gumbo-parser-0.10.1+dfsg/src/util.h
Examining data/gumbo-parser-0.10.1+dfsg/src/vector.c
Examining data/gumbo-parser-0.10.1+dfsg/src/vector.h
Examining data/gumbo-parser-0.10.1+dfsg/tests/attribute.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/char_ref.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/parser.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/string_buffer.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/string_piece.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/test_utils.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/test_utils.h
Examining data/gumbo-parser-0.10.1+dfsg/tests/tokenizer.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/utf8.cc
Examining data/gumbo-parser-0.10.1+dfsg/tests/vector.cc
Examining data/gumbo-parser-0.10.1+dfsg/visualc/include/strings.h
FINAL RESULTS:
data/gumbo-parser-0.10.1+dfsg/src/error.c:38:23: [4] (format) vsnprintf:
If format strings can be influenced by an attacker, they can be exploited,
and note that sprintf variations do not always \0-terminate (CWE-134). Use
a constant for the format specification.
int bytes_written = vsnprintf(
data/gumbo-parser-0.10.1+dfsg/src/error.c:50:18: [4] (format) vsnprintf:
If format strings can be influenced by an attacker, they can be exploited,
and note that sprintf variations do not always \0-terminate (CWE-134). Use
a constant for the format specification.
int result = vsnprintf(
data/gumbo-parser-0.10.1+dfsg/src/error.c:67:21: [4] (format) vsnprintf:
If format strings can be influenced by an attacker, they can be exploited,
and note that sprintf variations do not always \0-terminate (CWE-134). Use
a constant for the format specification.
bytes_written = vsnprintf(
data/gumbo-parser-0.10.1+dfsg/src/util.c:44:3: [4] (buffer) strcpy:
Does not check for buffer overflows when copying to destination [MS-banned]
(CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy
easily misused).
strcpy(buffer, str);
data/gumbo-parser-0.10.1+dfsg/src/util.c:54:3: [4] (format) vprintf:
If format strings can be influenced by an attacker, they can be exploited
(CWE-134). Use a constant for the format specification.
vprintf(format, args);
data/gumbo-parser-0.10.1+dfsg/examples/get_title.c:78:14: [2] (misc) fopen:
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).
FILE* fp = fopen(filename, "r");
data/gumbo-parser-0.10.1+dfsg/src/parser.c:42:9: [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.
typedef char gumbo_tagset[GUMBO_TAG_LAST];
data/gumbo-parser-0.10.1+dfsg/src/string_buffer.c:42:5: [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(new_data, buffer->data, buffer->length);
data/gumbo-parser-0.10.1+dfsg/src/string_buffer.c:90:3: [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(output->data + output->length, str->data, str->length);
data/gumbo-parser-0.10.1+dfsg/src/string_buffer.c:97:3: [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(buffer, input->data, input->length);
data/gumbo-parser-0.10.1+dfsg/src/string_piece.c:46:3: [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(buffer, source->data, source->length);
data/gumbo-parser-0.10.1+dfsg/src/vector.c:57:7: [2] (buffer) memcpy:
Does not check for buffer overflows when copying to destination (CWE-120).
Make sure destination can always hold the source data.
memcpy(temp, vector->data, old_num_bytes);
data/gumbo-parser-0.10.1+dfsg/tests/string_buffer.cc:45:3: [2] (buffer) strcpy:
Does not check for buffer overflows when copying to destination [MS-banned]
(CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy
easily misused). Risk is low because the source is a constant string.
strcpy(buffer_.data, "01234567890123456789");
data/gumbo-parser-0.10.1+dfsg/tests/string_buffer.cc:93:3: [2] (buffer) strcpy:
Does not check for buffer overflows when copying to destination [MS-banned]
(CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy
easily misused). Risk is low because the source is a constant string.
strcpy(buffer_.data, "012345");
data/gumbo-parser-0.10.1+dfsg/benchmarks/benchmark.cc:59:10: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
in.read(&contents[0], contents.size());
data/gumbo-parser-0.10.1+dfsg/examples/clean_text.cc:64:6: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
in.read(&contents[0], contents.size());
data/gumbo-parser-0.10.1+dfsg/examples/find_links.cc:60:6: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
in.read(&contents[0], contents.size());
data/gumbo-parser-0.10.1+dfsg/examples/positions_of_class.cc:82:6: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
in.read(&contents[0], contents.size());
data/gumbo-parser-0.10.1+dfsg/examples/prettyprint.cc:346:6: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
in.read(&contents[0], contents.size());
data/gumbo-parser-0.10.1+dfsg/examples/serialize.cc:279:6: [1] (buffer) read:
Check buffer boundaries if used in a loop including recursive loops
(CWE-120, CWE-20).
in.read(&contents[0], contents.size());
data/gumbo-parser-0.10.1+dfsg/src/parser.c:2848:32: [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).
int prompt_attr_length = strlen(prompt_attr->value);
data/gumbo-parser-0.10.1+dfsg/src/parser.c:4068:38: [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).
&kGumboDefaultOptions, buffer, strlen(buffer));
data/gumbo-parser-0.10.1+dfsg/src/tag.c:94:35: [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).
return gumbo_tagn_enum(tagname, strlen(tagname));
data/gumbo-parser-0.10.1+dfsg/src/tokenizer.c:380:18: [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).
int text_len = strlen(text);
data/gumbo-parser-0.10.1+dfsg/src/tokenizer.c:792:9: [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).
if (strlen(attr->name) == tag_state->_buffer.length &&
data/gumbo-parser-0.10.1+dfsg/src/util.c:43:48: [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).
char* buffer = gumbo_parser_allocate(parser, strlen(str) + 1);
data/gumbo-parser-0.10.1+dfsg/tests/char_ref.cc:43:40: [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).
utf8iterator_init(&parser_, input, strlen(input), &iter_);
data/gumbo-parser-0.10.1+dfsg/tests/parser.cc:45:58: [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).
output_ = gumbo_parse_with_options(&options_, input, strlen(input));
data/gumbo-parser-0.10.1+dfsg/tests/parser.cc:60:58: [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).
output_ = gumbo_parse_with_options(&options_, input, strlen(input));
data/gumbo-parser-0.10.1+dfsg/tests/tokenizer.cc:41:49: [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).
gumbo_tokenizer_state_init(&parser_, input, strlen(input));
data/gumbo-parser-0.10.1+dfsg/tests/utf8.cc:40:39: [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).
utf8iterator_init(&parser_, text, strlen(text), &input_);
ANALYSIS SUMMARY:
Hits = 31
Lines analyzed = 38465 in approximately 2.27 seconds (16919 lines/second)
Physical Source Lines of Code (SLOC) = 34315
Hits@level = [0] 7 [1] 17 [2] 9 [3] 0 [4] 5 [5] 0
Hits@level+ = [0+] 38 [1+] 31 [2+] 14 [3+] 5 [4+] 5 [5+] 0
Hits/KSLOC@level+ = [0+] 1.10739 [1+] 0.903395 [2+] 0.407985 [3+] 0.145709 [4+] 0.145709 [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.