The asn1_time_to_time_t function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse (1) notBefore and (2) notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted certificate that is not properly handled by the openssl_x509_parse function.
https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
https://bugzilla.redhat.com/show_bug.cgi?id=1036830
http://www.ubuntu.com/usn/USN-2055-1
http://www.securitytracker.com/id/1029472
http://www.securityfocus.com/bid/64225
http://www.php.net/ChangeLog-5.php
http://www.debian.org/security/2013/dsa-2816
http://support.apple.com/kb/HT6150
http://secunia.com/advisories/59652
http://rhn.redhat.com/errata/RHSA-2013-1826.html
http://rhn.redhat.com/errata/RHSA-2013-1825.html
http://rhn.redhat.com/errata/RHSA-2013-1824.html
http://rhn.redhat.com/errata/RHSA-2013-1815.html
http://rhn.redhat.com/errata/RHSA-2013-1813.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=c1224573c773b6845e83505f717fbf820fc18415
http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21