The phpBB input validation methods may fail to sanitize user input resulting in a disclosure of arbitrary file data.
phpBB is a customizable open source bulletin board package. It contains functionality that allows users to specify graphic files for use as "avatars." These files may be located on a remote server or on a filesystem. However, a local file upload path using the default, temporary remote server name can cause the remote phpBB server to interpret a file local to the server as the avatar file. This file will then be made available to theuser for download or viewing.
If the remote avatar and remote avatar uploading functions are enabled (which are disabled by default), a remote, authenticated attacker who is allowed to specify remote avatars may be able to access arbitrary files on the phpBB server with the permissions of the web server.
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Thanks to AnthraX101 for reporting this vulnerability.
This document was written by Ken MacInnis.
|Date First Published:||2005-02-25|
|Date Last Updated:||2005-03-17 13:58 UTC|