alpine 3.6
access weakness #439


Weakness Breakdown


An access weakness occurs when software does not properly implement permissions that could have unintended consequences if exploited by malicious actors. An example of this weakness is when a default username and password are set by the developer but do not get changed by the system administrator.

Warning code(s):

Ensure that umask is given most restrictive possible setting.

File Name:



The highlighted line of code below is the trigger point of this particular Alpine 3.6 access weakness.


/* Similarly, return true if it's OK for chmod and similar operations
   to fail, where errno is the error number that chmod failed with and
   X is the copying option set.  */

static bool
owner_failure_ok (struct cp_options const *x)
  return ((errno == EPERM || errno == EINVAL) && !x->owner_privileges);

/* Return the user's umask, caching the result.

   FIXME: If the destination's parent directory has has a default ACL,
   some operating systems (e.g., GNU/Linux's "POSIX" ACLs) use that
   ACL's mask rather than the process umask.  Currently, the callers
   of cached_umask incorrectly assume that this situation cannot occur.  */
extern mode_t
cached_umask (void)
  static mode_t mask = (mode_t) -1;
  if (mask == (mode_t) -1)
      mask = umask (0);
      umask (mask);
  return mask;

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