fopen_wrappers.c in PHP 5.3.x through 5.3.3 might allow remote attackers to bypass open_basedir restrictions via vectors related to the length of a filename.
http://www.vupen.com/english/advisories/2011/0077
http://www.vupen.com/english/advisories/2010/3313
http://www.ubuntu.com/usn/USN-1042-1
http://www.securityfocus.com/bid/44723
http://www.php.net/releases/5_3_4.php
http://www.php.net/releases/5_2_15.php
http://www.php.net/archive/2010.php#id2010-12-10-1
http://www.php.net/ChangeLog-5.php
http://www.mandriva.com/security/advisories?name=MDVSA-2010:218
http://svn.php.net/viewvc?view=revision&revision=303824
http://svn.php.net/viewvc/php/php-src/trunk/main/fopen_wrappers.c?r1=303824&r2=303823&pathrev=303824
http://support.apple.com/kb/HT5002
http://support.apple.com/kb/HT4581
http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.490619
http://security-tracker.debian.org/tracker/CVE-2010-3436
http://secunia.com/advisories/42812
http://secunia.com/advisories/42729
http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html