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/dhcp-helper-1.2/dhcp-helper.c

FINAL RESULTS:

data/dhcp-helper-1.2/dhcp-helper.c:171:6:  [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(user, optarg);
data/dhcp-helper-1.2/dhcp-helper.c:176:6:  [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(runfile, optarg);
data/dhcp-helper-1.2/dhcp-helper.c:102:20:  [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.
      int option = getopt(argc, argv, "b:e:i:s:u:r:dvpn");
data/dhcp-helper-1.2/dhcp-helper.c:63:3:  [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 name[IF_NAMESIZE];
data/dhcp-helper-1.2/dhcp-helper.c:80:14:  [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 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
data/dhcp-helper-1.2/dhcp-helper.c:82:12:  [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.
  unsigned char options[312];
data/dhcp-helper-1.2/dhcp-helper.c:328:22:  [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).
      if ((pidfile = fopen(runfile, "w")))
data/dhcp-helper-1.2/dhcp-helper.c:366:7:  [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 control[CMSG_SPACE(sizeof(struct in_pktinfo))];
data/dhcp-helper-1.2/dhcp-helper.c:550:3:  [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(pa, &saddr, sizeof(struct sockaddr_in));
data/dhcp-helper-1.2/dhcp-helper.c:552:3:  [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(req.arp_ha.sa_data, packet->chaddr, packet->hlen);
data/dhcp-helper-1.2/dhcp-helper.c:119:6:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	    strncpy(new->name, optarg, IF_NAMESIZE);
data/dhcp-helper-1.2/dhcp-helper.c:120:6:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	    strncpy(ifr.ifr_name, optarg, IF_NAMESIZE);
data/dhcp-helper-1.2/dhcp-helper.c:134:15:  [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).
	    else if (strlen(optarg) > IF_NAMESIZE)
data/dhcp-helper-1.2/dhcp-helper.c:170:23:  [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 ((user = malloc(strlen(optarg) + 1)))
data/dhcp-helper-1.2/dhcp-helper.c:175:26:  [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 ((runfile = malloc(strlen(optarg) + 1)))
data/dhcp-helper-1.2/dhcp-helper.c:325:7:  [1] (access) umask:
  Ensure that umask is given most restrictive possible setting (e.g., 066 or
  077) (CWE-732).
      umask(022); /* make pidfile 0644 */
data/dhcp-helper-1.2/dhcp-helper.c:334:7:  [1] (access) umask:
  Ensure that umask is given most restrictive possible setting (e.g., 066 or
  077) (CWE-732).
      umask(0);
data/dhcp-helper-1.2/dhcp-helper.c:494:3:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
		strncpy(ifr.ifr_name, tmp->name, IF_NAMESIZE);
data/dhcp-helper-1.2/dhcp-helper.c:553:3:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
		strncpy(req.arp_dev, ifr.ifr_name, 16);

ANALYSIS SUMMARY:

Hits = 19
Lines analyzed = 564 in approximately 0.04 seconds (14469 lines/second)
Physical Source Lines of Code (SLOC) = 441
Hits@level = [0]  12 [1]   9 [2]   7 [3]   1 [4]   2 [5]   0
Hits@level+ = [0+]  31 [1+]  19 [2+]  10 [3+]   3 [4+]   2 [5+]   0
Hits/KSLOC@level+ = [0+] 70.2948 [1+] 43.0839 [2+] 22.6757 [3+] 6.80272 [4+] 4.53515 [5+]   0
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.