phpBB 2.0.21 does not properly handle pathnames ending in %00, which allows remote authenticated administrative users to upload arbitrary files, as demonstrated by a query to admin/admin_board.php with an avatar_path parameter ending in .php%00.Referenceshttp://www.securityfocus.com/bid/20347http://www.securityfocus.com/archive/1/445788/100/0/threadedhttp://bugs.debian.org/cgi-bin/bugreport.cgi?bug=388120http://secunia.com/advisories/28871https://exchange.xforce.ibmcloud.com/vulnerabilities/28884http://www.securityfocus.com/bid/21806http://www.debian.org/security/2008/dsa-1488http://www.security.nnov.ru/Odocument221.htmlhttp://www.phpbb.com/phpBB/viewtopic.php?f=14&t=489624http://secunia.com/advisories/22188
