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/pnscan-1.14.1/bm.c
Examining data/pnscan-1.14.1/bm.h
Examining data/pnscan-1.14.1/pnscan.c
Examining data/pnscan-1.14.1/t_listen.c

FINAL RESULTS:

data/pnscan-1.14.1/t_listen.c:72:13:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
    port = (random()%port_len)+port_base;
data/pnscan-1.14.1/pnscan.c:555:14:  [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 buf[RESPONSE_MAX_SIZE];
data/pnscan-1.14.1/pnscan.c:819:5:  [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 buf[1024];
data/pnscan-1.14.1/pnscan.c:965:5:  [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 first[1024], last[1024];
data/pnscan-1.14.1/pnscan.c:1018:5:  [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 first[256];
data/pnscan-1.14.1/pnscan.c:1019:5:  [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 last[256];
data/pnscan-1.14.1/pnscan.c:1137:24:  [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.
		    wstr = (unsigned char *) strdup(argv[i]+2);
data/pnscan-1.14.1/pnscan.c:1139:24:  [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.
		    wstr = (unsigned char *) strdup(argv[++i]);
data/pnscan-1.14.1/pnscan.c:1152:24:  [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.
		    wstr = (unsigned char *) strdup(argv[i]+2);
data/pnscan-1.14.1/pnscan.c:1154:24:  [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.
		    wstr = (unsigned char *) strdup(argv[++i]);
data/pnscan-1.14.1/pnscan.c:1167:24:  [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.
		    rstr = (unsigned char *) strdup(argv[i]+2);
data/pnscan-1.14.1/pnscan.c:1169:24:  [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.
		    rstr = (unsigned char *) strdup(argv[++i]);
data/pnscan-1.14.1/pnscan.c:1182:24:  [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.
		    rstr = (unsigned char *) strdup(argv[i]+2);
data/pnscan-1.14.1/pnscan.c:1184:24:  [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.
		    rstr = (unsigned char *) strdup(argv[++i]);
data/pnscan-1.14.1/t_listen.c:101:8:  [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).
  dup2(open("/dev/null", O_RDONLY), 0);
data/pnscan-1.14.1/t_listen.c:103:8:  [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).
  dup2(open("/dev/null", O_WRONLY), 1);
data/pnscan-1.14.1/bm.c:227:23:  [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).
    bm_setup(argv[1], strlen(argv[1]));
data/pnscan-1.14.1/bm.c:229:30:  [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).
    pos = bm_search(argv[2], strlen(argv[2]));
data/pnscan-1.14.1/pnscan.c:322:19:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
    while ((len = read(fd, buf, size)) < 0 && errno == EINTR)
data/pnscan-1.14.1/pnscan.c:990:13:  [1] (buffer) sscanf:
  It's unclear if the %s limit in the format string is small enough
  (CWE-120). Check that the limit is sufficiently small, or use a different
  input function.
    switch (sscanf(str, "%1023[^: ] : %1023s", first, last))
data/pnscan-1.14.1/pnscan.c:1025:13:  [1] (buffer) sscanf:
  It's unclear if the %s limit in the format string is small enough
  (CWE-120). Check that the limit is sufficiently small, or use a different
  input function.
    switch (sscanf(str, "%255[^: ] : %255s", first, last)) 
data/pnscan-1.14.1/t_listen.c:115:24:  [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 (write(r_fd, msg, strlen(msg)) < 0)

ANALYSIS SUMMARY:

Hits = 22
Lines analyzed = 1738 in approximately 0.05 seconds (35861 lines/second)
Physical Source Lines of Code (SLOC) = 1216
Hits@level = [0]  88 [1]   6 [2]  15 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+] 110 [1+]  22 [2+]  16 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 90.4605 [1+] 18.0921 [2+] 13.1579 [3+] 0.822368 [4+]   0 [5+]   0
Dot directories skipped = 2 (--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.