The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.
https://exchange.xforce.ibmcloud.com/vulnerabilities/68536
https://bugzilla.redhat.com/show_bug.cgi?id=720612
http://www.ubuntu.com/usn/USN-1175-1
http://www.securityfocus.com/bid/48618
http://www.openwall.com/lists/oss-security/2011/07/13/2
http://www.kb.cert.org/vuls/id/819894
http://www.debian.org/security/2011/dsa-2287
http://support.apple.com/kb/HT5281
http://support.apple.com/kb/HT5002
http://security.gentoo.org/glsa/glsa-201206-15.xml
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-2673
http://www.redhat.com/support/errata/RHSA-2011-1105.html
http://www.redhat.com/support/errata/RHSA-2011-1104.html
http://www.redhat.com/support/errata/RHSA-2011-1103.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
http://www.libpng.org/pub/png/libpng.html
http://secunia.com/advisories/49660
http://secunia.com/advisories/45492
http://secunia.com/advisories/45461
http://secunia.com/advisories/45460
http://secunia.com/advisories/45445
http://secunia.com/advisories/45415
http://secunia.com/advisories/45405