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/utf8gen-1.1/src/utf8gen.c FINAL RESULTS: data/utf8gen-1.1/src/utf8gen.c:469:7: [4] (format) fprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. fprintf (outfp, utf_format, utf8_bytes[i] & 0xFF); data/utf8gen-1.1/src/utf8gen.c:526:7: [4] (format) fprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. fprintf (outfp, in_format, codept); data/utf8gen-1.1/src/utf8gen.c:528:7: [4] (format) fprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. fprintf (outfp, in_format, codept, codept); data/utf8gen-1.1/src/utf8gen.c:545:13: [4] (format) fprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. fprintf (outfp, rem_format, &instring[i]); data/utf8gen-1.1/src/utf8gen.c:73:4: [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 instring[MAXSTRING]; /* input line */ data/utf8gen-1.1/src/utf8gen.c:174:28: [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). infp = fopen (argv[i], "r"); data/utf8gen-1.1/src/utf8gen.c:190:29: [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). outfp = fopen (argv[i], "w"); data/utf8gen-1.1/src/utf8gen.c:531:17: [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). instring [strlen (instring) - 1] = '\0'; data/utf8gen-1.1/src/utf8gen.c:544:18: [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). if (i < strlen (instring) && instring[i] != '\0') { ANALYSIS SUMMARY: Hits = 9 Lines analyzed = 589 in approximately 0.03 seconds (21133 lines/second) Physical Source Lines of Code (SLOC) = 366 Hits@level = [0] 35 [1] 2 [2] 3 [3] 0 [4] 4 [5] 0 Hits@level+ = [0+] 44 [1+] 9 [2+] 7 [3+] 4 [4+] 4 [5+] 0 Hits/KSLOC@level+ = [0+] 120.219 [1+] 24.5902 [2+] 19.1257 [3+] 10.929 [4+] 10.929 [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.