Unknown vulnerability in CGI module for PHP 4.3.0 allows attackers to access arbitrary files as the PHP user, and possibly execute PHP code, by bypassing the CGI force redirect settings (cgi.force_redirect or --enable-force-cgi-redirect).
http://www.slackware.com/changelog/current.php?cpu=i386
http://www.securityfocus.com/bid/6875
http://www.iss.net/security_center/static/11343.php
http://marc.info/?l=bugtraq&m=104567137502557&w=2