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/an-1.2/an.c Examining data/an-1.2/an.h Examining data/an-1.2/bitfield.c Examining data/an-1.2/bitfield.h Examining data/an-1.2/malloc.c Examining data/an-1.2/malloc.h Examining data/an-1.2/unicode.c Examining data/an-1.2/unicode.h Examining data/an-1.2/words.c Examining data/an-1.2/words.h FINAL RESULTS: data/an-1.2/an.c:131:19: [3] (buffer) getopt_long: 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 ((opt = getopt_long (argc, argv, "c:d:hl:m:n:t:u:vw", data/an-1.2/an.c:147:24: [2] (integer) atoi: Unless checked, the resulting number can exceed the expected range (CWE-190). If source untrusted, check both minimum and maximum, even if the input had no minus sign (large numbers can roll over into negative number; consider saving to an unsigned value if that is intended). maxwords = atoi(optarg); data/an-1.2/an.c:150:22: [2] (integer) atoi: Unless checked, the resulting number can exceed the expected range (CWE-190). If source untrusted, check both minimum and maximum, even if the input had no minus sign (large numbers can roll over into negative number; consider saving to an unsigned value if that is intended). minlen = atoi(optarg); data/an-1.2/an.c:153:24: [2] (integer) atoi: Unless checked, the resulting number can exceed the expected range (CWE-190). If source untrusted, check both minimum and maximum, even if the input had no minus sign (large numbers can roll over into negative number; consider saving to an unsigned value if that is intended). maxtotal = atoi(optarg); data/an-1.2/words.c:115:5: [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 line[LONGEST_WORD]; data/an-1.2/words.c:117:12: [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). dict = fopen(filename, "r"); data/an-1.2/words.c:123:26: [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 *l = line + strlen(line) - 1; ANALYSIS SUMMARY: Hits = 7 Lines analyzed = 942 in approximately 0.03 seconds (30053 lines/second) Physical Source Lines of Code (SLOC) = 624 Hits@level = [0] 14 [1] 1 [2] 5 [3] 1 [4] 0 [5] 0 Hits@level+ = [0+] 21 [1+] 7 [2+] 6 [3+] 1 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 33.6538 [1+] 11.2179 [2+] 9.61538 [3+] 1.60256 [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.