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/nqp-2020.10+dfsg/src/vm/moar/runner/main.c
Examining data/nqp-2020.10+dfsg/tools/templates/unix/nqp-m-build.c
Examining data/nqp-2020.10+dfsg/tools/templates/windows/nqp-m-build.c

FINAL RESULTS:

data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:114:9:  [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(*out_home, env_home);
data/nqp-2020.10+dfsg/tools/templates/unix/nqp-m-build.c:35:5:  [4] (shell) execv:
  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.
    execv(moar, exec_argv);
data/nqp-2020.10+dfsg/tools/templates/windows/nqp-m-build.c:17:18:  [4] (buffer) wcscpy:
  Does not check for buffer overflows when copying to destination [MS-banned]
  (CWE-120). Consider using a function version that stops copying at the end
  of the buffer.
        if (out) wcscpy(out, in);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:109:32:  [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.
    char   *env_home         = getenv(env_var);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:258:9:  [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("MVM_TELEMETRY_LOG")) {
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:261:38:  [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.
        snprintf(path, 255, "%s.%d", getenv("MVM_TELEMETRY_LOG"),
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:346:9:  [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("MVM_TELEMETRY_LOG") && telemeh_inited) {
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:164:11:  [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.
    const char    nqp_rel_path[14]    = "/../share/nqp";
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:166:11:  [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.
    const char    nqp_check_path[28]  = "/lib/NQPCORE.setting.moarvm";
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:170:5:  [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 *lib_path[1];
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:259:9:  [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[256];
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:268:14:  [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).
        fp = fopen(path, "w");
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:279:5:  [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(exec_dir_path_temp, exec_path, exec_path_size + 1);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:290:5:  [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(exec_dir_path, exec_dir_path_temp, exec_dir_path_size + 1);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:308:5:  [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(lib_path[0], nqp_home, nqp_home_size);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:309:5:  [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(nqp_file,    nqp_home, nqp_home_size);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:312:5:  [2] (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). Risk is low because the source is a constant string.
    strcpy(lib_path[0] + nqp_home_size, "\\lib");
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:313:5:  [2] (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). Risk is low because the source is a constant string.
    strcpy(nqp_file    + nqp_home_size, "\\lib\\nqp.moarvm");
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:315:5:  [2] (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). Risk is low because the source is a constant string.
    strcpy(lib_path[0] + nqp_home_size, "/lib");
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:316:5:  [2] (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). Risk is low because the source is a constant string.
    strcpy(nqp_file    + nqp_home_size, "/lib/nqp.moarvm");
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:49:23:  [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).
    size_t str_len  = strlen(str);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:50:23:  [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).
    size_t want_len = strlen(want);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:112:21:  [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).
        home_size = strlen(env_home);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:127:9:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
        strncpy(*out_home, exec_dir_path, home_size);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:128:9:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings.
        strncat(*out_home, rel_home, rel_home_size);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:133:5:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
    strncpy(check_file_path, *out_home, home_size + check_file_size);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:134:5:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings.
    strncat(check_file_path, check_file, check_file_size);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:194:22:  [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).
    exec_path_size = strlen(exec_path);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:230:46:  [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).
                char *portstr = argv[argi] + strlen("--debug-port=");
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:288:26:  [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).
    exec_dir_path_size = strlen(exec_dir_path_temp);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:293:26:  [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).
    exec_dir_path_size = strlen(exec_dir_path);
data/nqp-2020.10+dfsg/src/vm/moar/runner/main.c:301:21:  [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).
    nqp_home_size = strlen(nqp_home);
data/nqp-2020.10+dfsg/tools/templates/windows/nqp-m-build.c:18:16:  [1] (buffer) wcslen:
  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).
        return wcslen(in) + 1;

ANALYSIS SUMMARY:

Hits = 33
Lines analyzed = 571 in approximately 0.54 seconds (1067 lines/second)
Physical Source Lines of Code (SLOC) = 450
Hits@level = [0]   8 [1]  13 [2]  13 [3]   4 [4]   3 [5]   0
Hits@level+ = [0+]  41 [1+]  33 [2+]  20 [3+]   7 [4+]   3 [5+]   0
Hits/KSLOC@level+ = [0+] 91.1111 [1+] 73.3333 [2+] 44.4444 [3+] 15.5556 [4+] 6.66667 [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.