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/pnglite-0.1.17/pnglite.c
Examining data/pnglite-0.1.17/pnglite.h

FINAL RESULTS:

data/pnglite-0.1.17/pnglite.c:63:11:  [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.
	unsigned char buf[4];
data/pnglite-0.1.17/pnglite.c:75:11:  [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.
	unsigned char buf[4];
data/pnglite-0.1.17/pnglite.c:92:11:  [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.
	unsigned char foo[4];
data/pnglite-0.1.17/pnglite.c:94:2:  [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(foo, buf, 4);
data/pnglite-0.1.17/pnglite.c:158:11:  [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.
	unsigned char ihdr[13+4];		 /* length should be 13, make room for type (IHDR) */
data/pnglite-0.1.17/pnglite.c:204:11:  [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.
	unsigned char ihdr[13+4];
data/pnglite-0.1.17/pnglite.c:259:2:  [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 header[8];
data/pnglite-0.1.17/pnglite.c:301:13:  [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, "rb");
data/pnglite-0.1.17/pnglite.c:311:13:  [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, "wb");
data/pnglite-0.1.17/pnglite.c:496:2:  [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(chunk, "IDAT", 4);
data/pnglite-0.1.17/pnglite.c:652:9:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
        memcpy(out, in, len);
data/pnglite-0.1.17/pnglite.c:763:4:  [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(data+outpos, filtered+pos, png->width * stride);
data/pnglite-0.1.17/pnglite.c:834:3:  [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(&filtered[i*png->width*png->bpp+i+1], data + i * png->width*png->bpp, png->width*png->bpp);

ANALYSIS SUMMARY:

Hits = 13
Lines analyzed = 1105 in approximately 0.03 seconds (34909 lines/second)
Physical Source Lines of Code (SLOC) = 749
Hits@level = [0]  19 [1]   0 [2]  13 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  32 [1+]  13 [2+]  13 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 42.7236 [1+] 17.3565 [2+] 17.3565 [3+]   0 [4+]   0 [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.