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/farbfeld-4/ff2png.c
Examining data/farbfeld-4/arg.h
Examining data/farbfeld-4/util.h
Examining data/farbfeld-4/ff2jpg.c
Examining data/farbfeld-4/ff2ppm.c
Examining data/farbfeld-4/png2ff.c
Examining data/farbfeld-4/ff2pam.c
Examining data/farbfeld-4/util.c
Examining data/farbfeld-4/jpg2ff.c

FINAL RESULTS:

data/farbfeld-4/util.c:24:2:  [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, fmt, ap);
data/farbfeld-4/util.c:98:6:  [4] (buffer) sscanf:
  The scanf() family's %s operation, without a limit specification, permits
  buffer overflows (CWE-120, CWE-20). Specify a limit to %s, or use a
  different input function. If the scanf format is influenceable by an
  attacker, it's exploitable.
	if (sscanf(s, fmt, col, col + 1, col + 2) != 3) {
data/farbfeld-4/util.c:86:18:  [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.
parse_mask(const char *s, uint16_t mask[3])
data/farbfeld-4/util.h:15:22:  [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 parse_mask(const char *, uint16_t mask[3]);
data/farbfeld-4/util.c:26:20:  [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).
	if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
data/farbfeld-4/util.c:92:9:  [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).
	slen = strlen(s);

ANALYSIS SUMMARY:

Hits = 6
Lines analyzed = 824 in approximately 0.07 seconds (11069 lines/second)
Physical Source Lines of Code (SLOC) = 622
Hits@level = [0]   6 [1]   2 [2]   2 [3]   0 [4]   2 [5]   0
Hits@level+ = [0+]  12 [1+]   6 [2+]   4 [3+]   2 [4+]   2 [5+]   0
Hits/KSLOC@level+ = [0+] 19.2926 [1+] 9.6463 [2+] 6.43087 [3+] 3.21543 [4+] 3.21543 [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.