(Vendor Issues Fix) phpBB Input Validation Flaw in 'viewtopic.php' 'postorder' Variable Lets Remote Users Conduct Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1009298 |
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SecurityTracker URL: http://securitytracker.com/id/1009298
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CVE Reference:
CAN-2004-0339
(Links to External Site)
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Updated: Mar 23 2004
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Original Entry Date: Mar 3 2004
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Impact:
Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 2.0.6c
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Description:
An input validation vulnerability was reported in phpBB in 'viewtopic.php'. A remote user can conduct cross-site scripting attacks.
Cheng Peng Su reported that the script does not validate user-supplied input in the 'postorder' variable. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the phpBB software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
A demonstration exploit URL is provided:
http://site/phpBB/viewtopic.php?t=123456&postorder=%22%3E%3C%73%63%72%69%70%74%3E%61%6C%65%72%74%28%64%6F%63%75%6D%65%6E%74%2E%63%6F%6F%6B%69%65%
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Impact:
A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the phpBB software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
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Solution:
The vendor has released a fixed version (2.0.6d), available at:
http://www.phpbb.com/
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Vendor URL: www.phpbb.com/phpBB/viewtopic.php?f=14&t=177594 (Links to External Site)
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Cause:
Input validation error
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Underlying OS:
Linux (Any), UNIX (Any), Windows (Any)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 03 Mar 2004 01:36:36 -0500
Subject: http://www.phpbb.com/phpBB/viewtopic.php?f=14&t=177594
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http://www.phpbb.com/phpBB/viewtopic.php?f=14&t=177594
> A new release of phpBB 2.0.6 is now available for download, phpBB 2.0.6d. This
> addresses a vulnerability in viewtopic, a potential issue with login and may
> address current issues with Zend Optimizer 2.5.
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