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/ruby-fast-stemmer-1.0.2/ext/porter.c Examining data/ruby-fast-stemmer-1.0.2/ext/porter_wrap.c FINAL RESULTS: data/ruby-fast-stemmer-1.0.2/ext/porter.c:431:18: [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 * f = fopen(argv[i],"r"); data/ruby-fast-stemmer-1.0.2/ext/porter.c:400:16: [1] (buffer) getc: Check buffer boundaries if used in a loop including recursive loops (CWE-120, CWE-20). { int ch = getc(f); data/ruby-fast-stemmer-1.0.2/ext/porter.c:412:18: [1] (buffer) getc: Check buffer boundaries if used in a loop including recursive loops (CWE-120, CWE-20). ch = getc(f); data/ruby-fast-stemmer-1.0.2/ext/porter_wrap.c:27:2: [1] (buffer) strncpy: Easily used incorrectly; doesn't always \0-terminate or check for invalid pointers [MS-banned] (CWE-120). strncpy(word, RSTRING_PTR(str), RSTRING_LEN(str)); data/ruby-fast-stemmer-1.0.2/ext/porter_wrap.c:30:27: [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). length = stem(&z, word, strlen(word)-1); ANALYSIS SUMMARY: Hits = 5 Lines analyzed = 483 in approximately 0.05 seconds (9772 lines/second) Physical Source Lines of Code (SLOC) = 281 Hits@level = [0] 2 [1] 4 [2] 1 [3] 0 [4] 0 [5] 0 Hits@level+ = [0+] 7 [1+] 5 [2+] 1 [3+] 0 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 24.911 [1+] 17.7936 [2+] 3.55872 [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.