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/debdelta-0.65/minigzip.c

FINAL RESULTS:

data/debdelta-0.65/minigzip.c:175:5:  [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(outfile, file);
data/debdelta-0.65/minigzip.c:176:5:  [4] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused).
    strcat(outfile, Z_SUFFIX);
data/debdelta-0.65/minigzip.c:210:5:  [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(buf, file);
data/debdelta-0.65/minigzip.c:219:9:  [4] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused).
        strcat(infile, Z_SUFFIX);
data/debdelta-0.65/minigzip.c:104:11:  [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.
    local char buf[BUFLEN];
data/debdelta-0.65/minigzip.c:137:11:  [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.
    local char buf[BUFLEN];
data/debdelta-0.65/minigzip.c:171:11:  [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.
    local char outfile[MAX_NAME_LEN];
data/debdelta-0.65/minigzip.c:178:10:  [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).
    in = fopen(file, "rb");
data/debdelta-0.65/minigzip.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.
    local char buf[MAX_NAME_LEN];
data/debdelta-0.65/minigzip.c:230:11:  [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).
    out = fopen(outfile, "wb");
data/debdelta-0.65/minigzip.c:257:5:  [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 outmode[20];
data/debdelta-0.65/minigzip.c:259:5:  [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(outmode, "wb6 ");
data/debdelta-0.65/minigzip.c:208:22:  [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).
    uInt len = (uInt)strlen(file);

ANALYSIS SUMMARY:

Hits = 13
Lines analyzed = 311 in approximately 0.04 seconds (7263 lines/second)
Physical Source Lines of Code (SLOC) = 215
Hits@level = [0]   4 [1]   1 [2]   8 [3]   0 [4]   4 [5]   0
Hits@level+ = [0+]  17 [1+]  13 [2+]  12 [3+]   4 [4+]   4 [5+]   0
Hits/KSLOC@level+ = [0+] 79.0698 [1+] 60.4651 [2+] 55.814 [3+] 18.6047 [4+] 18.6047 [5+]   0
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.