CVE-2013-0157

(a) mount and (b) umount in util-linux 2.14.1, 2.17.2, and probably other
versions allow local users to determine the existence of restricted
directories by (1) using the --guess-fstype command-line option or (2)
attempting to mount a non-existent device, which generates different error
messages depending on whether the directory exists.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=697464&gt;