diff -Naur gdm-3.6.2-orig/daemon/main.c gdm-3.6.2/daemon/main.c
--- gdm-3.6.2-orig/daemon/main.c	2012-12-02 23:14:06.000000000 +0400
+++ gdm-3.6.2/daemon/main.c	2013-02-13 02:03:25.773054755 +0400
@@ -495,7 +495,7 @@
 
         /* Set up /var/run/gdm */
         g_mkdir_with_parents (GDM_RAN_ONCE_MARKER_DIR, 0755);
-        g_chmod (GDM_RAN_ONCE_MARKER_DIR, S_IRWXU | S_IRWXG);
+        g_chmod (GDM_RAN_ONCE_MARKER_DIR, S_IRWXU | S_IRWXG | S_IXOTH);
 
         /* XDM compliant error message */
         if (getuid () != 0) {