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/libguess-1.2/src/examples/guessconv/guessconv.c
Examining data/libguess-1.2/src/tests/harness.c
Examining data/libguess-1.2/src/libguess/libguess.h
Examining data/libguess-1.2/src/libguess/dfa.h
Examining data/libguess-1.2/src/libguess/dfa.c
Examining data/libguess-1.2/src/libguess/guess_tab.c
Examining data/libguess-1.2/src/libguess/guess_impl.c
Examining data/libguess-1.2/src/libguess/guess.c

FINAL RESULTS:

data/libguess-1.2/src/examples/guessconv/guessconv.c:202:17:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
    while ((r = getopt(argc, argv, "l:i:o:O:v")) != -1)
data/libguess-1.2/src/examples/guessconv/guessconv.c:133:5:  [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 outbuf[OUTBUF_SIZE];
data/libguess-1.2/src/examples/guessconv/guessconv.c:211:27:  [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).
            if ((infile = fopen(optarg, "r")) == NULL)
data/libguess-1.2/src/examples/guessconv/guessconv.c:219:28:  [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).
            if ((outfile = fopen(optarg, "w")) == NULL)
data/libguess-1.2/src/libguess/dfa.h:30:12:  [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.
    signed char (*states)[256];
data/libguess-1.2/src/tests/harness.c:9:5:  [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 buf[1024 * 1024];
data/libguess-1.2/src/tests/harness.c:14:10:  [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).
    fp = fopen(argv[1], "r");
data/libguess-1.2/src/examples/guessconv/guessconv.c:79:21:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
        ssize_t n = read(fd, inptr, maxlen - actlen);
data/libguess-1.2/src/examples/guessconv/guessconv.c:108:21:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
                n = read (fd, inptr, maxlen - actlen);
data/libguess-1.2/src/tests/harness.c:23:34:  [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).
        printf("length = %zu\n", strlen(buf));
data/libguess-1.2/src/tests/harness.c:24:62:  [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).
        printf("jp = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_JP));
data/libguess-1.2/src/tests/harness.c:25:62:  [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).
        printf("tw = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_TW));
data/libguess-1.2/src/tests/harness.c:26:62:  [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).
        printf("cn = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_CN));
data/libguess-1.2/src/tests/harness.c:27:62:  [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).
        printf("kr = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_KR));
data/libguess-1.2/src/tests/harness.c:28:62:  [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).
        printf("ru = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_RU));
data/libguess-1.2/src/tests/harness.c:29:62:  [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).
        printf("ar = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_AR));
data/libguess-1.2/src/tests/harness.c:30:62:  [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).
        printf("tr = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_TR));
data/libguess-1.2/src/tests/harness.c:31:62:  [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).
        printf("gr = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_GR));
data/libguess-1.2/src/tests/harness.c:32:62:  [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).
        printf("hw = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_HW));
data/libguess-1.2/src/tests/harness.c:33:62:  [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).
        printf("pl = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_PL));
data/libguess-1.2/src/tests/harness.c:34:62:  [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).
        printf("bl = %s\n", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_BL));

ANALYSIS SUMMARY:

Hits = 21
Lines analyzed = 2659 in approximately 0.18 seconds (14784 lines/second)
Physical Source Lines of Code (SLOC) = 2254
Hits@level = [0]  28 [1]  14 [2]   6 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  49 [1+]  21 [2+]   7 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 21.7391 [1+] 9.31677 [2+] 3.10559 [3+] 0.443656 [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.