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/mininet-2.2.2/mnexec.c
Examining data/mininet-2.2.2/util/sch_htb-ofbuf/sch_htb.c

FINAL RESULTS:

data/mininet-2.2.2/mnexec.c:208:9:  [4] (shell) execvp:
  This causes a new program to execute and is difficult to use safely
  (CWE-78). try using a library call that implements the same functionality
  if available.
        execvp(argv[optind], &argv[optind]);
data/mininet-2.2.2/mnexec.c:105:17:  [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, "+cdnpa:g:r:vh")) != -1)
data/mininet-2.2.2/mnexec.c:173:21:  [3] (misc) chroot:
  chroot can be very helpful, but is hard to use correctly (CWE-250, CWE-22).
  Make sure the program immediately chdir("/"), closes file descriptors, and
  drops root privileges, and that all necessary files (and no more!) are in
  the new root.
                if (chroot(path) < 0) {
data/mininet-2.2.2/mnexec.c:69:12:  [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.
    static char path[PATH_MAX];
data/mininet-2.2.2/mnexec.c:81:13:  [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).
        f = fopen(path, "w");
data/mininet-2.2.2/mnexec.c:99:5:  [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 path[PATH_MAX];
data/mininet-2.2.2/mnexec.c:156:19:  [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).
            pid = atoi(optarg);
data/mininet-2.2.2/mnexec.c:157:13:  [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(path, "/proc/%d/ns/net", pid);
data/mininet-2.2.2/mnexec.c:158:20:  [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).
            nsid = open(path, O_RDONLY);
data/mininet-2.2.2/mnexec.c:168:13:  [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(path, "/proc/%d/ns/mnt", pid);
data/mininet-2.2.2/mnexec.c:169:20:  [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).
            nsid = open(path, O_RDONLY);
data/mininet-2.2.2/mnexec.c:172:17:  [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(path, "/proc/%d/root", pid);
data/mininet-2.2.2/mnexec.c:190:33:  [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).
            sp.sched_priority = atoi(optarg);

ANALYSIS SUMMARY:

Hits = 13
Lines analyzed = 1860 in approximately 0.06 seconds (33427 lines/second)
Physical Source Lines of Code (SLOC) = 1332
Hits@level = [0]   7 [1]   0 [2]  10 [3]   2 [4]   1 [5]   0
Hits@level+ = [0+]  20 [1+]  13 [2+]  13 [3+]   3 [4+]   1 [5+]   0
Hits/KSLOC@level+ = [0+] 15.015 [1+] 9.75976 [2+] 9.75976 [3+] 2.25225 [4+] 0.750751 [5+]   0
Symlinks skipped = 1 (--allowlink overrides but see doc for security issue)
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.