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/statserial-1.1/statserial.c

FINAL RESULTS:

data/statserial-1.1/statserial.c:94:5:  [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(device, argv[optind]); /* one argument */
data/statserial-1.1/statserial.c:113:5:  [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(device, getenv("MODEM"));
data/statserial-1.1/statserial.c:115:5:  [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(device, defaultDevice);
data/statserial-1.1/statserial.c:124:5:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
    sprintf(s, "statserial: can't open device `%s'", device);
data/statserial-1.1/statserial.c:67:15:  [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 ((c = getopt(argc, argv, flags)) != EOF) {
data/statserial-1.1/statserial.c:112:7:  [3] (buffer) getenv:
  Environment variables are untrustable input if they can be set by an
  attacker. They can have any content and length, and the same variable can
  be set more than once (CWE-807, CWE-20). Check environment variables
  carefully before using them.
  if (getenv("MODEM"))
data/statserial-1.1/statserial.c:113:20:  [3] (buffer) getenv:
  Environment variables are untrustable input if they can be set by an
  attacker. They can have any content and length, and the same variable can
  be set more than once (CWE-807, CWE-20). Check environment variables
  carefully before using them.
    strcpy(device, getenv("MODEM"));
data/statserial-1.1/statserial.c:44:1:  [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 device[127];                          /* name of device to open */
data/statserial-1.1/statserial.c:121:8:  [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).
  fd = open(device, O_RDONLY | O_NONBLOCK | O_NOCTTY);
data/statserial-1.1/statserial.c:123:5:  [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 s[255];

ANALYSIS SUMMARY:

Hits = 10
Lines analyzed = 211 in approximately 0.02 seconds (9627 lines/second)
Physical Source Lines of Code (SLOC) = 137
Hits@level = [0]  22 [1]   0 [2]   3 [3]   3 [4]   4 [5]   0
Hits@level+ = [0+]  32 [1+]  10 [2+]  10 [3+]   7 [4+]   4 [5+]   0
Hits/KSLOC@level+ = [0+] 233.577 [1+] 72.9927 [2+] 72.9927 [3+] 51.0949 [4+] 29.1971 [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.