Integer overflow in the _gd2GetHeader function in gd_gd2.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via crafted chunk dimensions in an image.
https://security.gentoo.org/glsa/201612-09
https://libgd.github.io/release-2.2.3.html
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
http://www.ubuntu.com/usn/USN-3030-1
http://www.openwall.com/lists/oss-security/2016/06/23/4
http://www.debian.org/security/2016/dsa-3619
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://rhn.redhat.com/errata/RHSA-2016-2598.html
http://php.net/ChangeLog-7.php
http://php.net/ChangeLog-5.php
http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html