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-unicode-0.4.4.4/ext/unicode/wstring.h Examining data/ruby-unicode-0.4.4.4/ext/unicode/ustring.c Examining data/ruby-unicode-0.4.4.4/ext/unicode/unicode.c Examining data/ruby-unicode-0.4.4.4/ext/unicode/wstring.c Examining data/ruby-unicode-0.4.4.4/ext/unicode/ustring.h FINAL RESULTS: data/ruby-unicode-0.4.4.4/ext/unicode/unicode.c:448:3: [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 ustr[13]; /* stored two UTF-8 chars */ data/ruby-unicode-0.4.4.4/ext/unicode/ustring.c:54:3: [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(s->str + s->len, a, len); data/ruby-unicode-0.4.4.4/ext/unicode/wstring.c:58:3: [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(s->str + s->len, a, len * sizeof(int)); data/ruby-unicode-0.4.4.4/ext/unicode/wstring.c:82:3: [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(s->str + s->len, add->str, add->len * sizeof(int)); ANALYSIS SUMMARY: Hits = 4 Lines analyzed = 1881 in approximately 0.06 seconds (28966 lines/second) Physical Source Lines of Code (SLOC) = 1612 Hits@level = [0] 6 [1] 0 [2] 4 [3] 0 [4] 0 [5] 0 Hits@level+ = [0+] 10 [1+] 4 [2+] 4 [3+] 0 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 6.20347 [1+] 2.48139 [2+] 2.48139 [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.