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/icmptx-0.2/icmptx.c
Examining data/icmptx-0.2/it.c
Examining data/icmptx-0.2/tun_dev.c
Examining data/icmptx-0.2/tun_dev.h

FINAL RESULTS:

data/icmptx-0.2/icmptx.c:38:5:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
    fprintf(stderr, USAGE, argv[0]);
data/icmptx-0.2/icmptx.c:42:5:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
    fprintf(stderr, USAGE, argv[0]);
data/icmptx-0.2/tun_dev.c:41:5:  [4] (format) snprintf:
  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.
int snprintf(char *str, size_t size, const char *format, ...);
data/icmptx-0.2/it.c:135:7:  [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(&(target->sin_addr.s_addr), &(from.sin_addr.s_addr), 4*sizeof(char));
data/icmptx-0.2/it.c:192:5:  [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 (&target.sin_addr.s_addr, he->h_addr_list[0], he->h_length);
data/icmptx-0.2/tun_dev.c:47:3:  [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 tunname[14];
data/icmptx-0.2/tun_dev.c:51:5:  [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(tunname, "/dev/tun%d", i);
data/icmptx-0.2/tun_dev.c:53:13:  [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( (fd=open(tunname, O_RDWR)) > 0 ){
data/icmptx-0.2/tun_dev.c:72:13:  [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 ((fd = open("/dev/net/tun", O_RDWR)) < 0) {
data/icmptx-0.2/tun_dev.c:105:10:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  return read(fd, buf, len);

ANALYSIS SUMMARY:

Hits = 10
Lines analyzed = 432 in approximately 0.02 seconds (19233 lines/second)
Physical Source Lines of Code (SLOC) = 236
Hits@level = [0]   3 [1]   1 [2]   6 [3]   0 [4]   3 [5]   0
Hits@level+ = [0+]  13 [1+]  10 [2+]   9 [3+]   3 [4+]   3 [5+]   0
Hits/KSLOC@level+ = [0+] 55.0847 [1+] 42.3729 [2+] 38.1356 [3+] 12.7119 [4+] 12.7119 [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.