The png_do_expand_palette function in libpng before 1.6.8 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via (1) a PLTE chunk of zero bytes or (2) a NULL palette, related to pngrtran.c and pngset.c.
https://www.ibm.com/support/docview.wss?uid=swg21675973
https://bugzilla.redhat.com/show_bug.cgi?id=1045561
https://access.redhat.com/errata/RHSA-2014:0414
https://access.redhat.com/errata/RHSA-2014:0413
http://www.securityfocus.com/bid/64493
http://www.oracle.com/technetwork/topics/security/cpuapr2014-1972952.html
http://www.mandriva.com/security/advisories?name=MDVSA-2014:035
http://www.libpng.org/pub/png/libpng.html
http://www.kb.cert.org/vuls/id/650142
http://www-01.ibm.com/support/docview.wss?uid=swg21676746
http://www-01.ibm.com/support/docview.wss?uid=swg21672080
http://sourceforge.net/projects/libpng/files/libpng16/1.6.8/
http://security.gentoo.org/glsa/glsa-201406-32.xml
http://secunia.com/advisories/59058
http://secunia.com/advisories/58974
http://marc.info/?l=bugtraq&m=140852974709252&w=2
http://marc.info/?l=bugtraq&m=140852886808946&w=2
http://lists.opensuse.org/opensuse-updates/2014-01/msg00071.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128114.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128099.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128098.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127952.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127947.html