PHP before 5.2.5 allows local users to bypass protection mechanisms configured through php_admin_value or php_admin_flag in httpd.conf by using ini_set to modify arbitrary configuration variables, a different issue than CVE-2006-4625.
https://issues.rpath.com/browse/RPL-1943
http://www.securityfocus.com/archive/1/491693/100/0/threaded
http://www.php.net/releases/5_2_5.php
http://www.php.net/ChangeLog-5.php#5.2.5
http://wiki.rpath.com/wiki/Advisories:rPSA-2007-0242
http://securitytracker.com/id?1018934
http://secunia.com/advisories/30040
http://secunia.com/advisories/27659