This vulnerability is only present when the register_globals PHP option is set to 'on'. This has not been the default setting for PHP installs since version 4.2.0 (22-Apr-2002).
Upgrade to version 0.23 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
Secunia Advisory ID:25751 Related OSVDB ID: 37517 Related OSVDB ID: 37519 Other Advisory URL: http://milw0rm.com/exploits/4085 ISS X-Force ID: 34950 FrSIRT Advisory: ADV-2007-2266 CVE-2007-3297 Bugtraq ID: 24554