bugtraq - Advisory 12/2006: phpMyAdmin - error.php XSS Vulnerability

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Date: Thu, 2 Nov 2006 09:10:38 +0100
From: Stefan Esser <sesser@...dened-php.net>
To: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Cc: red@...sec.de
Subject: Advisory 12/2006: phpMyAdmin - error.php XSS Vulnerability

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                        Hardened-PHP Project
                        www.hardened-php.net

                      -= Security  Advisory =-

     Advisory: phpMyAdmin - error.php XSS Vulnerability
 Release Date: 2006/11/02
Last Modified: 2006/11/02
       Author: Stefan Esser [sesser@...dened-php.net]

  Application: phpMyAdmin <= 2.9.0.2
     Severity: XSS vulnerability in an error displaying script
         Risk: Medium Critical
Vendor Status: Vendor has a released an updated version
   References: http://www.hardened-php.net/advisory_122006.137.html

Overview:

   Quote from http://www.phpmyadmin.net
   "phpMyAdmin is a tool written in PHP intended to handle the 
   administration of MySQL over the Web. Currently it can create and 
   drop databases, create/drop/alter tables, delete/edit/add fields, 
   execute any SQL statement, manage keys on fields, manage privileges,
   export data into various formats and is available in 50 languages."

   It was discovered that phpMyAdmin comes with a script to display
   error messages that supports displaying the error in a user supplied 
   charset. Unfortunately the encoding of the error message is not 
   taking the charset into account which can result into XSS when UTF-7 
   is selected. (Other charsets like US-ASCII can also be used to 
   exploit this in some browsers.)

   To trigger this XSS vulnerability an attacker just needs to call 
   the error displaying script with charset=utf-7 and utf-7 encoded
   HTML tags in the error message.

Proof of Concept:

   The Hardened-PHP Project is not going to release exploits for
   this vulnerability to the public.

Disclosure Timeline:

   18. October 2006    - Contacted phpMyAdmin developers by email
   01. November 2006   - Updated phpMyAdmin was released
   02. November 2006   - Public Disclosure

Recommendation:

   It is strongly recommended to upgrade to the newest version of
   phpMyAdmin 2.9.0.3 which you can download at:

   http://www.phpmyadmin.net/home_page/downloads.php

GPG-Key:

   http://www.hardened-php.net/hardened-php-signature-key.asc

   pub  1024D/0A864AA1 2004-04-17 Hardened-PHP Signature Key
   Key fingerprint = 066F A6D0 E57E 9936 9082  7E52 4439 14CC 0A86 4AA1

Copyright 2006 Stefan Esser. All rights reserved.

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