bugtraq - Barnraiser Prairie OpenID idp: Directory traversal attack

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Message-Id: <201306251009.r5PA91JX004920@sf01web2.securityfocus.com>
Date: Tue, 25 Jun 2013 10:09:01 GMT
From: prairie@...linator.com
To: bugtraq@...urityfocus.com
Subject: Barnraiser Prairie OpenID idp: Directory traversal attack

The OpenID idp software "Barnraiser Prairie" 
http://www.barnraiser.org/prairie/ is vulnerable to directory traversal attacks:

./get_file.php does not limit the given path and allows directory traversal attacks with full public access to all images on the server.

Example exploit:
get_file.php?avatar=..&width=../../../../../../../../usr/share/apache2/icons/apache_pb.png