| Package | Affected versions | Patched versions |
|---|---|---|
| util-linux | = 2.14.1= 2.17.2 |
(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.
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