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/tcptraceroute-1.5beta7+debian/tcptraceroute.h Examining data/tcptraceroute-1.5beta7+debian/util.c Examining data/tcptraceroute-1.5beta7+debian/datalink.h Examining data/tcptraceroute-1.5beta7+debian/capture.c Examining data/tcptraceroute-1.5beta7+debian/probe.h Examining data/tcptraceroute-1.5beta7+debian/datalink.c Examining data/tcptraceroute-1.5beta7+debian/probe.c Examining data/tcptraceroute-1.5beta7+debian/util.h Examining data/tcptraceroute-1.5beta7+debian/capture.h Examining data/tcptraceroute-1.5beta7+debian/main.c FINAL RESULTS: data/tcptraceroute-1.5beta7+debian/datalink.c:198:3: [4] (buffer) strcpy: Does not check for buffer overflows when copying to destination [MS-banned] (CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy easily misused). strcpy(ifr.ifr_name, ifrp->ifr_name); data/tcptraceroute-1.5beta7+debian/datalink.c:266:3: [4] (buffer) strcpy: Does not check for buffer overflows when copying to destination [MS-banned] (CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy easily misused). strcpy(p->name, ifr.ifr_name); data/tcptraceroute-1.5beta7+debian/probe.c:391:2: [4] (format) printf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. printf(record->string, record->delta); data/tcptraceroute-1.5beta7+debian/util.c:36:2: [4] (format) vfprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. vfprintf(stderr, fmt, ap); data/tcptraceroute-1.5beta7+debian/util.c:48:2: [4] (format) vfprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. vfprintf(stderr, fmt, ap); data/tcptraceroute-1.5beta7+debian/util.c:59:2: [4] (format) vfprintf: If format strings can be influenced by an attacker, they can be exploited (CWE-134). Use a constant for the format specification. vfprintf(stderr, fmt, ap); data/tcptraceroute-1.5beta7+debian/util.c:124:8: [4] (format) vsnprintf: If format strings can be influenced by an attacker, they can be exploited, and note that sprintf variations do not always \0-terminate (CWE-134). Use a constant for the format specification. ret = vsnprintf(s, size, fmt, ap); data/tcptraceroute-1.5beta7+debian/main.c:399:15: [3] (buffer) getopt: 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 ((op = getopt(argc, argv, optstring)) != -1) data/tcptraceroute-1.5beta7+debian/capture.c:86:3: [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(buf, packet + (offset), len - (offset)); \ data/tcptraceroute-1.5beta7+debian/capture.c:310:5: [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 s[TEXTSIZE]; data/tcptraceroute-1.5beta7+debian/datalink.c:119:9: [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 name[TEXTSIZE]; data/tcptraceroute-1.5beta7+debian/main.c:29:1: [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 dst_name[TEXTSIZE], dst_prt_name[TEXTSIZE], filter[TEXTSIZE]; data/tcptraceroute-1.5beta7+debian/main.c:36:1: [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 errbuf [PCAP_ERRBUF_SIZE > LIBNET_ERRBUF_SIZE ? data/tcptraceroute-1.5beta7+debian/main.c:219:9: [2] (integer) atoi: Unless checked, the resulting number can exceed the expected range (CWE-190). If source untrusted, check both minimum and maximum, even if the input had no minus sign (large numbers can roll over into negative number; consider saving to an unsigned value if that is intended). return atoi(optarg); data/tcptraceroute-1.5beta7+debian/main.c:507:15: [2] (integer) atoi: Unless checked, the resulting number can exceed the expected range (CWE-190). If source untrusted, check both minimum and maximum, even if the input had no minus sign (large numbers can roll over into negative number; consider saving to an unsigned value if that is intended). o_pktlen = atoi(argv[2]); data/tcptraceroute-1.5beta7+debian/main.c:512:15: [2] (integer) atoi: Unless checked, the resulting number can exceed the expected range (CWE-190). If source untrusted, check both minimum and maximum, even if the input had no minus sign (large numbers can roll over into negative number; consider saving to an unsigned value if that is intended). dst_prt = atoi(argv[1]); data/tcptraceroute-1.5beta7+debian/probe.c:299:9: [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 laststate[TEXTSIZE]; data/tcptraceroute-1.5beta7+debian/probe.c:354:3: [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 buf[TEXTSIZE]; data/tcptraceroute-1.5beta7+debian/util.c:138:9: [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[TEXTSIZE]; data/tcptraceroute-1.5beta7+debian/util.c:224:9: [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 output[IPTOSBUFFERS][IPTOSBUFSIZ]; data/tcptraceroute-1.5beta7+debian/datalink.c:265:28: [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). p->name = xrealloc(NULL, strlen(ifr.ifr_name) + 1); data/tcptraceroute-1.5beta7+debian/util.c:115:9: [1] (buffer) strncpy: Easily used incorrectly; doesn't always \0-terminate or check for invalid pointers [MS-banned] (CWE-120). return strncpy(dst, src, size-1); ANALYSIS SUMMARY: Hits = 22 Lines analyzed = 2361 in approximately 0.44 seconds (5312 lines/second) Physical Source Lines of Code (SLOC) = 1519 Hits@level = [0] 30 [1] 2 [2] 12 [3] 1 [4] 7 [5] 0 Hits@level+ = [0+] 52 [1+] 22 [2+] 20 [3+] 8 [4+] 7 [5+] 0 Hits/KSLOC@level+ = [0+] 34.233 [1+] 14.4832 [2+] 13.1666 [3+] 5.26662 [4+] 4.60829 [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.