Integer overflow in the SdnToJulian function in the Calendar extension in PHP before 5.3.6 allows context-dependent attackers to cause a denial of service (application crash) via a large integer in the first argument to the cal_from_jd function.
http://www.vupen.com/english/advisories/2011/0744
http://www.securityfocus.com/bid/46967
http://www.redhat.com/support/errata/RHSA-2011-1423.html
http://www.php.net/ChangeLog-5.php
http://www.mandriva.com/security/advisories?name=MDVSA-2011:053
http://www.mandriva.com/security/advisories?name=MDVSA-2011:052
http://www.debian.org/security/2011/dsa-2266
http://support.apple.com/kb/HT5002
http://secunia.com/advisories/48668
http://rhn.redhat.com/errata/RHSA-2012-0071.html
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00016.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html