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/dropwatch-1.5.3/src/dwdump.c Examining data/dropwatch-1.5.3/src/lookup.c Examining data/dropwatch-1.5.3/src/lookup.h Examining data/dropwatch-1.5.3/src/lookup_bfd.c Examining data/dropwatch-1.5.3/src/lookup_kas.c Examining data/dropwatch-1.5.3/src/main.c Examining data/dropwatch-1.5.3/src/net_dropmon.h FINAL RESULTS: data/dropwatch-1.5.3/src/lookup_bfd.c:39:2: [4] (buffer) sprintf: Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or vsnprintf. sprintf(dbibuf,"/usr/lib/debug/lib/modules/%s", uts.release); data/dropwatch-1.5.3/src/dwdump.c:685:16: [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, optstring, data/dropwatch-1.5.3/src/main.c:1099:7: [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. c = getopt_long(argc, argv, "l:", options, &optind); data/dropwatch-1.5.3/src/dwdump.c:78:11: [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. unsigned char addr[8]; data/dropwatch-1.5.3/src/dwdump.c:434:2: [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(dwdump->pcap_buf + sizeof(struct linux_sll), buf, pkt_len); data/dropwatch-1.5.3/src/dwdump.c:466:2: [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(dwdump->pcap_buf, &sll, sizeof(sll)); data/dropwatch-1.5.3/src/dwdump.c:692:32: [2] (integer) atol: 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). dwdump->options.trunc_len = atol(optarg); data/dropwatch-1.5.3/src/dwdump.c:703:32: [2] (integer) atol: 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). dwdump->options.queue_len = atol(optarg); data/dropwatch-1.5.3/src/dwdump.c:715:28: [2] (integer) atol: 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). dwdump->options.rxbuf = atol(optarg); data/dropwatch-1.5.3/src/lookup_kas.c:79:7: [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). pf = fopen("/proc/kallsyms", "r"); data/dropwatch-1.5.3/src/main.c:418:3: [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(&location, alert->points[i].pc, sizeof(void *)); data/dropwatch-1.5.3/src/lookup_bfd.c:38:18: [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). dbibuf = malloc(strlen("/usr/lib/debug/lib/modules") + strlen(uts.release) + 1); data/dropwatch-1.5.3/src/lookup_bfd.c:38:57: [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). dbibuf = malloc(strlen("/usr/lib/debug/lib/modules") + strlen(uts.release) + 1); data/dropwatch-1.5.3/src/main.c:527:8: [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). tstr[strlen(tstr) - 1] = 0; ANALYSIS SUMMARY: Hits = 14 Lines analyzed = 2418 in approximately 0.09 seconds (25755 lines/second) Physical Source Lines of Code (SLOC) = 1855 Hits@level = [0] 124 [1] 3 [2] 8 [3] 2 [4] 1 [5] 0 Hits@level+ = [0+] 138 [1+] 14 [2+] 11 [3+] 3 [4+] 1 [5+] 0 Hits/KSLOC@level+ = [0+] 74.3935 [1+] 7.54717 [2+] 5.92992 [3+] 1.61725 [4+] 0.539084 [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.