alpine 3.6
access weakness #356


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.

      char *path;
     int nmode, parent_mode;
  int oumask;
  struct stat sb;
  char *p, *npath;

  if (stat (path, &sb) == 0)
      if (S_ISDIR (sb.st_mode) == 0)
	  builtin_error ("'%s': file exists but is not a directory", path);
	  return 1;
      if (chmod (path, nmode))
          builtin_error ("%s: %s", path, strerror (errno));
          return 1;

      return 0;

  oumask = umask (0);
  npath = savestring (path);	/* So we can write to it. */
  /* Check whether or not we need to do anything with intermediate dirs. */

  /* Skip leading slashes. */
  p = npath;
  while (*p == '/')

  while (p = strchr (p, '/'))
      *p = '\0';
      if (stat (npath, &sb) != 0)
	  if (mkdir (npath, parent_mode))
	      builtin_error ("cannot create directory '%s': %s", npath, strerror (errno));
	      umask (original_umask);
	      free (npath);
	      return 1;
      else if (S_ISDIR (sb.st_mode) == 0)
          builtin_error ("'%s': file exists but is not a directory", npath); 

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