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CVE-2013-2179

Published: 27 December 2013

X.Org xdm 1.1.10, 1.1.11, and possibly other versions, when performing authentication using certain implementations of the crypt API function that can return NULL, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by attempting to log into an account whose password field contains invalid characters, as demonstrated using the crypt function from glibc 2.17 and later with (1) the "!" character in the salt portion of a password field or (2) a password that has been encrypted using DES or MD5 in FIPS-140 mode.

Notes

AuthorNote
mdeslaur
not affected on Debian/Ubuntu because of PAM

Priority

Medium

Status

Package Release Status
xdm
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise Not vulnerable

quantal Not vulnerable

raring Not vulnerable

upstream Needs triage