alpine 3.6
access weakness #469


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.

  /* open libmspack */
  if (err) {
    if (err == MSPACK_ERR_SEEK) {
              "FATAL ERROR: libmspack is compiled for %d-bit file IO,\n"
              "             cabextract is compiled for %d-bit file IO.\n",
              (sizeof(off_t) == 4) ? 64 : 32,
              (sizeof(off_t) == 4) ? 32 : 64);
    else {
      fprintf(stderr, "FATAL ERROR: libmspack self-test returned %d\n", err);
    return EXIT_FAILURE;

  if (!(cabd = mspack_create_cab_decompressor(&cabextract_system))) {
    fprintf(stderr, "can't create libmspack CAB decompressor\n");
    return EXIT_FAILURE;

  /* obtain user's umask */
  umask(user_umask = umask(0));

  /* turn on/off 'fix MSZIP' and 'salvage' mode */
  cabd->set_param(cabd, MSCABD_PARAM_FIXMSZIP, args.fix);
  cabd->set_param(cabd, MSCABD_PARAM_SALVAGE, args.fix);

  /* set up converter for given encoding */
    if (args.encoding) {
      if ((converter = iconv_open("UTF8", args.encoding)) == (iconv_t) -1) {
        converter = NULL;
        fprintf(stderr, "FATAL ERROR: encoding '%s' is not recognised\n",
        return EXIT_FAILURE;

  /* process cabinets */
  for (i = optind, err = 0; i < argc; i++) {
    err += process_cabinet(argv[i]);

  /* error summary */
  if (!args.quiet) { 

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