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/libcidr-1.2.3/include/libcidr.h
Examining data/libcidr-1.2.3/src/examples/acl/acl.c
Examining data/libcidr-1.2.3/src/examples/cidrcalc/cidrcalc.c
Examining data/libcidr-1.2.3/src/include/libcidr_pow2_p.h
Examining data/libcidr-1.2.3/src/test/compare/compare.c
Examining data/libcidr-1.2.3/src/test/inaddr/inaddr.c
Examining data/libcidr-1.2.3/src/test/kids/kids.c
Examining data/libcidr-1.2.3/src/test/mkstr/mkstr.c
Examining data/libcidr-1.2.3/src/test/netbc/netbc.c
Examining data/libcidr-1.2.3/src/test/nums/nums.c
Examining data/libcidr-1.2.3/src/test/parent/parent.c
Examining data/libcidr-1.2.3/src/cidr_addr.c
Examining data/libcidr-1.2.3/src/cidr_compare.c
Examining data/libcidr-1.2.3/src/cidr_from_str.c
Examining data/libcidr-1.2.3/src/cidr_get.c
Examining data/libcidr-1.2.3/src/cidr_inaddr.c
Examining data/libcidr-1.2.3/src/cidr_mem.c
Examining data/libcidr-1.2.3/src/cidr_misc.c
Examining data/libcidr-1.2.3/src/cidr_net.c
Examining data/libcidr-1.2.3/src/cidr_num.c
Examining data/libcidr-1.2.3/src/cidr_to_str.c

FINAL RESULTS:

data/libcidr-1.2.3/src/cidr_to_str.c:126:5:  [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(toret, tmpbuf);
data/libcidr-1.2.3/src/cidr_to_str.c:155:6:  [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(toret, tmpbuf);
data/libcidr-1.2.3/src/cidr_to_str.c:179:5:  [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(toret, tmpbuf);
data/libcidr-1.2.3/src/cidr_to_str.c:323:5:  [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(toret, tmpbuf);
data/libcidr-1.2.3/src/cidr_to_str.c:377:5:  [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(toret, nmstr);
data/libcidr-1.2.3/src/cidr_to_str.c:394:5:  [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(toret, tmpbuf);
data/libcidr-1.2.3/src/examples/acl/acl.c:291:4:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
			sprintf(toclnt, "Hi there, %s!\n", clstr);
data/libcidr-1.2.3/src/examples/acl/acl.c:336:4:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
			sprintf(toclnt, "Hi there, %s!\n", clstr);
data/libcidr-1.2.3/src/examples/acl/acl.c:414:4:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
			sprintf(tmpbuf, "\tChecking '%s'...  ", buf);
data/libcidr-1.2.3/src/examples/acl/acl.c:74:14:  [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((goch=getopt(argc, argv, "f:p:v"))!=-1)
data/libcidr-1.2.3/src/examples/cidrcalc/cidrcalc.c:94:14:  [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((goch=getopt(argc, argv, "bs"))!=-1)
data/libcidr-1.2.3/src/test/mkstr/mkstr.c:29:14:  [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((goch=getopt(argc, argv, "ev6cmapwrf:_"))!=-1)
data/libcidr-1.2.3/src/cidr_addr.c:31:2:  [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(toret->mask, addr->mask, (16 * sizeof(toret->mask[0])) );
data/libcidr-1.2.3/src/cidr_addr.c:76:2:  [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(toret->mask, addr->mask, (16 * sizeof(toret->mask[0])) );
data/libcidr-1.2.3/src/cidr_get.c:91:2:  [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(toret, addr->addr, sizeof(addr->addr));
data/libcidr-1.2.3/src/cidr_get.c:117:2:  [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(toret, addr->mask, sizeof(addr->mask));
data/libcidr-1.2.3/src/cidr_mem.c:39:2:  [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(toret, src, sizeof(CIDR));
data/libcidr-1.2.3/src/cidr_to_str.c:21:2:  [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 tmpbuf[128]; /* We shouldn't need more than ~5 anywhere */
data/libcidr-1.2.3/src/cidr_to_str.c:86:4:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
			sprintf(toret, "%d.%d.%d.%d.in-addr.arpa",
data/libcidr-1.2.3/src/cidr_to_str.c:101:7:  [2] (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 string.
						strcat(toret, "0000:0000:0000:0000:0000:");
data/libcidr-1.2.3/src/cidr_to_str.c:103:7:  [2] (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 string.
						strcat(toret, "0:0:0:0:0:");
data/libcidr-1.2.3/src/cidr_to_str.c:106:6:  [2] (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 string.
					strcat(toret, "::");
data/libcidr-1.2.3/src/cidr_to_str.c:113:8:  [2] (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 string.
							strcat(toret, "0000:");
data/libcidr-1.2.3/src/cidr_to_str.c:115:8:  [2] (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 string.
							strcat(toret, "0:");
data/libcidr-1.2.3/src/cidr_to_str.c:119:6:  [2] (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 string.
					strcat(toret, "ffff:");
data/libcidr-1.2.3/src/cidr_to_str.c:125:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(tmpbuf, "%u", (block->addr)[i]);
data/libcidr-1.2.3/src/cidr_to_str.c:154:6:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
					sprintf(tmpbuf, "%u", moct);
data/libcidr-1.2.3/src/cidr_to_str.c:176:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(tmpbuf, "%u",
data/libcidr-1.2.3/src/cidr_to_str.c:195:4:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
			sprintf(toret, "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x."
data/libcidr-1.2.3/src/cidr_to_str.c:289:6:  [2] (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 string.
					strcat(toret, "::");
data/libcidr-1.2.3/src/cidr_to_str.c:320:6:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
					sprintf(tmpbuf, "%.4x", v6sect);
data/libcidr-1.2.3/src/cidr_to_str.c:322:6:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
					sprintf(tmpbuf, "%x", v6sect);
data/libcidr-1.2.3/src/cidr_to_str.c:393:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(tmpbuf, "%u", pflen);
data/libcidr-1.2.3/src/examples/acl/acl.c:58:2:  [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 toclnt[2048]; /* Hardcoded, but who cares */
data/libcidr-1.2.3/src/examples/acl/acl.c:82:12:  [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).
				port = atoi(optarg);
data/libcidr-1.2.3/src/examples/acl/acl.c:114:8:  [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).
	afd = open(fname, O_RDONLY);
data/libcidr-1.2.3/src/examples/acl/acl.c:235:2:  [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(&(srv6.sin6_addr.s6_addr), &in6addr_any, sizeof(in6addr_any));
data/libcidr-1.2.3/src/examples/acl/acl.c:299:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(toclnt, "Your access is ACCEPTED!\nYou rock!\n\n");
data/libcidr-1.2.3/src/examples/acl/acl.c:305:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(toclnt, "Your access is DENIED!\nYou suck!\n\n");
data/libcidr-1.2.3/src/examples/acl/acl.c:344:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(toclnt, "Your access is ACCEPTED!\nYou rock!\n\n");
data/libcidr-1.2.3/src/examples/acl/acl.c:350:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(toclnt, "Your access is DENIED!\nYou suck!\n\n");
data/libcidr-1.2.3/src/examples/acl/acl.c:388:2:  [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 tmpbuf[1024]; /* Hardcoded */
data/libcidr-1.2.3/src/examples/acl/acl.c:402:5:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
				sprintf(tmpbuf, "\tDefault deny.\n");
data/libcidr-1.2.3/src/examples/acl/acl.c:422:5:  [2] (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 string.
				strcat(tmpbuf, "matched!\n");
data/libcidr-1.2.3/src/examples/acl/acl.c:438:4:  [2] (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 string.
			strcat(tmpbuf, "not matched!\n");
data/libcidr-1.2.3/src/examples/cidrcalc/cidrcalc.c:82:2:  [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 boct[9];
data/libcidr-1.2.3/src/test/inaddr/inaddr.c:27:2:  [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 pstr[PSLEN];
data/libcidr-1.2.3/src/cidr_from_str.c:30:26:  [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(addr==NULL || (_alen=strlen(addr))<1)
data/libcidr-1.2.3/src/cidr_to_str.c:128:6:  [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(toret, ".");
data/libcidr-1.2.3/src/cidr_to_str.c:140:5:  [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(toret, "/");
data/libcidr-1.2.3/src/cidr_to_str.c:157:7:  [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(toret, ".");
data/libcidr-1.2.3/src/cidr_to_str.c:302:6:  [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(toret, ":");
data/libcidr-1.2.3/src/cidr_to_str.c:334:5:  [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(toret, "/");
data/libcidr-1.2.3/src/examples/acl/acl.c:139:5:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
	if(read(afd, aclfile, ast.st_size)!=ast.st_size)
data/libcidr-1.2.3/src/examples/acl/acl.c:292:26:  [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).
			write(clsock, toclnt, strlen(toclnt));
data/libcidr-1.2.3/src/examples/acl/acl.c:300:27:  [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).
				write(clsock, toclnt, strlen(toclnt));
data/libcidr-1.2.3/src/examples/acl/acl.c:306:27:  [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).
				write(clsock, toclnt, strlen(toclnt));
data/libcidr-1.2.3/src/examples/acl/acl.c:337:26:  [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).
			write(clsock, toclnt, strlen(toclnt));
data/libcidr-1.2.3/src/examples/acl/acl.c:345:27:  [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).
				write(clsock, toclnt, strlen(toclnt));
data/libcidr-1.2.3/src/examples/acl/acl.c:351:27:  [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).
				write(clsock, toclnt, strlen(toclnt));
data/libcidr-1.2.3/src/examples/acl/acl.c:405:28:  [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).
					write(clsock, tmpbuf, strlen(tmpbuf));
data/libcidr-1.2.3/src/examples/acl/acl.c:425:28:  [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).
					write(clsock, tmpbuf, strlen(tmpbuf));
data/libcidr-1.2.3/src/examples/acl/acl.c:441:27:  [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).
				write(clsock, tmpbuf, strlen(tmpbuf));
data/libcidr-1.2.3/src/test/compare/compare.c:32:21:  [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(ifirst==NULL || strlen(ifirst)==0
data/libcidr-1.2.3/src/test/compare/compare.c:33:25:  [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).
	   || isecond==NULL || strlen(isecond)==0)

ANALYSIS SUMMARY:

Hits = 65
Lines analyzed = 4226 in approximately 0.35 seconds (11958 lines/second)
Physical Source Lines of Code (SLOC) = 2800
Hits@level = [0] 107 [1]  18 [2]  35 [3]   3 [4]   9 [5]   0
Hits@level+ = [0+] 172 [1+]  65 [2+]  47 [3+]  12 [4+]   9 [5+]   0
Hits/KSLOC@level+ = [0+] 61.4286 [1+] 23.2143 [2+] 16.7857 [3+] 4.28571 [4+] 3.21429 [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.