alpine 3.6
access weakness #168


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.

       close (accept_sock);	/* Avoid sd leak. */

  zebra_event (ZEBRA_SERV, accept_sock, NULL);
#else /* HAVE_TCP_ZEBRA */

/* For sockaddr_un. */
#include <sys/un.h>

/* zebra server UNIX domain socket. */
static void
zebra_serv_un (const char *path)
  int ret;
  int sock, len;
  struct sockaddr_un serv;
  mode_t old_mask;

  /* First of all, unlink existing socket */
  unlink (path);

  /* Set umask */
  old_mask = umask (0077);

  /* Make UNIX domain socket. */
  sock = socket (AF_UNIX, SOCK_STREAM, 0);
  if (sock < 0)
      zlog_warn ("Can't create zserv unix socket: %s", 
                 safe_strerror (errno));
      zlog_warn ("zebra can't provide full functionality due to above error");

  memset (&route_type_oaths, 0, sizeof (route_type_oaths));

  /* Make server socket. */
  memset (&serv, 0, sizeof (struct sockaddr_un));
  serv.sun_family = AF_UNIX;
  strncpy (serv.sun_path, path, strlen (path));
  len = serv.sun_len = SUN_LEN(&serv);
  len = sizeof (serv.sun_family) + strlen (serv.sun_path);

  ret = bind (sock, (struct sockaddr *) &serv, len);
  if (ret < 0) 

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