Integer overflow in the exif_process_IFD_TAG function in exif.c in PHP before 4.3.11 may allow remote attackers to execute arbitrary code via an IFD tag that leads to a negative byte count.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10822
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=154021
http://www.redhat.com/support/errata/RHSA-2005-406.html
http://www.redhat.com/support/errata/RHSA-2005-405.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:072
http://www.gentoo.org/security/en/glsa/glsa-200504-15.xml
http://lists.apple.com/archives/security-announce/2005/Jun/msg00000.html
http://cvs.php.net/diff.php/php-src/ext/exif/exif.c?r1=1.118.2.33&r2=1.118.2.34&ty=u