splash/Splash.cc in poppler before 0.22.1 allows context-dependent attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to the (1) Splash::arbitraryTransformMask, (2) Splash::blitMask, and (3) Splash::scaleMaskYuXu functions.
https://bugzilla.redhat.com/show_bug.cgi?id=917109
http://www.openwall.com/lists/oss-security/2013/02/28/8
http://www.openwall.com/lists/oss-security/2013/02/28/4
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