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/libaudio-mixer-perl-0.7/Mix.h Examining data/libaudio-mixer-perl-0.7/Mix.c FINAL RESULTS: data/libaudio-mixer-perl-0.7/Mix.c:280:5: [4] (buffer) strcat: Does not check for buffer overflows when concatenating to destination [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or snprintf (warning: strncat is easily misused). strcat(buf, dname[i]); data/libaudio-mixer-perl-0.7/Mix.c:33:8: [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. static char dev_fname[BUFSIZE] = ""; data/libaudio-mixer-perl-0.7/Mix.c:52:19: [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). if ((mixer_fd = open(dev_fname, O_RDWR)) < 0) { data/libaudio-mixer-perl-0.7/Mix.c:160:12: [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. return((char *) dname[j]); data/libaudio-mixer-perl-0.7/Mix.c:271:10: [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. static char buf[BUFSIZE]; data/libaudio-mixer-perl-0.7/Mix.c:40:3: [1] (buffer) strncpy: Easily used incorrectly; doesn't always \0-terminate or check for invalid pointers [MS-banned] (CWE-120). strncpy(dev_fname, fname, BUFSIZE-1); data/libaudio-mixer-perl-0.7/Mix.c:50:5: [1] (buffer) strncpy: Easily used incorrectly; doesn't always \0-terminate or check for invalid pointers [MS-banned] (CWE-120). strncpy(dev_fname, MIXER, BUFSIZE-1); data/libaudio-mixer-perl-0.7/Mix.c:111:9: [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). len = strlen(cntrl); data/libaudio-mixer-perl-0.7/Mix.c:179:8: [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). len = strlen(cntrl); data/libaudio-mixer-perl-0.7/Mix.c:230:9: [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). len = strlen(cntrl); data/libaudio-mixer-perl-0.7/Mix.c:275:9: [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). l = strlen(dname[i]); data/libaudio-mixer-perl-0.7/Mix.c:281:5: [1] (buffer) strcat: Does not check for buffer overflows when concatenating to destination [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or snprintf (warning: strncat is easily misused). Risk is low because the source is a constant character. strcat(buf, " "); ANALYSIS SUMMARY: Hits = 12 Lines analyzed = 323 in approximately 0.04 seconds (7821 lines/second) Physical Source Lines of Code (SLOC) = 239 Hits@level = [0] 8 [1] 7 [2] 4 [3] 0 [4] 1 [5] 0 Hits@level+ = [0+] 20 [1+] 12 [2+] 5 [3+] 1 [4+] 1 [5+] 0 Hits/KSLOC@level+ = [0+] 83.682 [1+] 50.2092 [2+] 20.9205 [3+] 4.1841 [4+] 4.1841 [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.