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/spi-tools-0.8.4/src/spi-config.c Examining data/spi-tools-0.8.4/src/spi-pipe.c FINAL RESULTS: data/spi-tools-0.8.4/src/spi-config.c:95:16: [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, "d:qhvwm:l:b:s:r:", options, &long_index)) >= 0) { data/spi-tools-0.8.4/src/spi-pipe.c:83:16: [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, "d:s:b:n:rhv", options, &long_index)) >= 0) { data/spi-tools-0.8.4/src/spi-config.c:169:7: [2] (misc) open: 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). fd = open(device, O_RDONLY); data/spi-tools-0.8.4/src/spi-pipe.c:141:7: [2] (misc) open: 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). fd = open(device, O_RDONLY); data/spi-tools-0.8.4/src/spi-pipe.c:161:9: [1] (buffer) read: Check buffer boundaries if used in a loop including recursive loops (CWE-120, CWE-20). nb = read(STDIN_FILENO, & (tx_buffer[offset]), blocksize - offset); ANALYSIS SUMMARY: Hits = 5 Lines analyzed = 443 in approximately 0.03 seconds (12751 lines/second) Physical Source Lines of Code (SLOC) = 355 Hits@level = [0] 50 [1] 1 [2] 2 [3] 2 [4] 0 [5] 0 Hits@level+ = [0+] 55 [1+] 5 [2+] 4 [3+] 2 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 154.93 [1+] 14.0845 [2+] 11.2676 [3+] 5.6338 [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.