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/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c
Examining data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.h

FINAL RESULTS:

data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:551:9:  [5] (race) chmod:
  This accepts filename arguments; if an attacker can move those files, a
  race condition results. (CWE-362). Use fchmod( ) instead.
  ret = chmod(path, 0664 & ~current_umask);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:272:3:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
  sprintf(*cache_path, "%s/%02x/%014llx", cachedir, first_byte, remainder);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:96:33:  [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 void bs_cache_path(const char * cachedir, const char * path, char (* cache_path)[MAX_CACHEPATH_SIZE]);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:96:56:  [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 void bs_cache_path(const char * cachedir, const char * path, char (* cache_path)[MAX_CACHEPATH_SIZE]);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:96:69:  [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 void bs_cache_path(const char * cachedir, const char * path, char (* cache_path)[MAX_CACHEPATH_SIZE]);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:265:21:  [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.
bs_cache_path(const char * cachedir, const char * path, char (* cache_path)[MAX_CACHEPATH_SIZE])
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:265:44:  [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.
bs_cache_path(const char * cachedir, const char * path, char (* cache_path)[MAX_CACHEPATH_SIZE])
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:265:57:  [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.
bs_cache_path(const char * cachedir, const char * path, char (* cache_path)[MAX_CACHEPATH_SIZE])
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:315:3:  [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 cache_path[MAX_CACHEPATH_SIZE];
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:333:8:  [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(path, O_RDONLY);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:393:8:  [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(path, O_RDONLY);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:500:3:  [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 template[MAX_CACHEPATH_SIZE + 20];
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:506:3:  [2] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused). Risk is low because the
  source is a constant string.
  strcat(tmp_path, ".tmp.XXXXXX");
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:509:8:  [2] (tmpfile) mkstemp:
  Potential for temporary file vulnerability in some circumstances. Some
  older Unix-like systems create temp files with permission to write by all
  by default, so be sure to set the umask to override this. Also, some older
  Unix systems might fail to use O_EXCL when opening the file, so make sure
  that O_EXCL is used by the library (CWE-377).
  fd = mkstemp(tmp_path);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:515:10:  [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(tmp_path, O_WRONLY | O_CREAT, 0664);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:152:19:  [1] (access) umask:
  Ensure that umask is given most restrictive possible setting (e.g., 066 or
  077) (CWE-732).
  current_umask = umask(0777);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:153:3:  [1] (access) umask:
  Ensure that umask is given most restrictive possible setting (e.g., 066 or
  077) (CWE-732).
  umask(current_umask);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:373:19:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  ssize_t nread = read(fd, key, KEY_SIZE);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:444:11:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  nread = read(fd, data, data_size);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:505:14:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
  tmp_path = strncpy(template, path, MAX_CACHEPATH_SIZE);
data/ruby-bootsnap-1.4.6/ext/bootsnap/bootsnap.c:566:11:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  nread = read(fd, *contents, size);

ANALYSIS SUMMARY:

Hits = 21
Lines analyzed = 835 in approximately 0.03 seconds (24583 lines/second)
Physical Source Lines of Code (SLOC) = 508
Hits@level = [0]   0 [1]   6 [2]  13 [3]   0 [4]   1 [5]   1
Hits@level+ = [0+]  21 [1+]  21 [2+]  15 [3+]   2 [4+]   2 [5+]   1
Hits/KSLOC@level+ = [0+] 41.3386 [1+] 41.3386 [2+] 29.5276 [3+] 3.93701 [4+] 3.93701 [5+] 1.9685
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.