poppler/Stream.cc in poppler before 0.22.1 allows context-dependent attackers to have an unspecified impact via vectors that trigger a read of uninitialized memory by the CCITTFaxStream::lookChar function.
https://bugzilla.redhat.com/show_bug.cgi?id=917111
http://www.openwall.com/lists/oss-security/2013/02/28/8
http://www.openwall.com/lists/oss-security/2013/02/28/4
http://www.mandriva.com/security/advisories?name=MDVSA-2013:143
http://www.debian.org/security/2013/dsa-2719
http://ubuntu.com/usn/usn-1785-1
http://secunia.com/advisories/52846
http://lists.fedoraproject.org/pipermail/package-announce/2013-March/100090.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-March/100081.html