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Category:   Application (Forum/Board/Portal)  >   phpBB Vendors:   phpBB Group
phpBB 'bbcode.php' Input Validation Flaw May Let Remote Users Execute Arbitrary Scripting Code
SecurityTracker Alert ID:  1013918
SecurityTracker URL:  http://securitytracker.com/id/1013918
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  May 9 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.0.15
Description:   Paul Laudanski reported a vulnerability in phpBB in the processing of BBCode. A remote user may be able to cause scripting code to be executed by the target user.

The make_clickable() function in the 'includes/bbcode.php' file does not properly validate user-supplied BBCode URLs. A remote user can create specially crafted BBCode that may be able to cause arbitrary scripting code to be executed by the target user's browser.

Papados from CastleCops discovered this vulnerability.

Impact:   A remote user may be able to cause arbitrary scripting code to be executed by the target user's browser.
Solution:   The vendor has released a fixed version (2.0.15), available at:

http://www.phpbb.com/downloads.php

Vendor URL:  www.phpbb.com/phpBB/viewtopic.php?f=14&t=288194 (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 3 2005 (Exploit Details Are Provided) phpBB 'bbcode.php' Input Validation Flaw May Let Remote Users Execute Arbitrary Scripting Code   (Paul Laudanski <zx@castlecops.com>)
Some additional information is available, including exploit information.



 Source Message Contents

Date:  Sun, 8 May 2005 00:03:59 -0400 (EDT)
Subject:  phpbb 2.0.15 released - patches high critical vuln


I don't normally send an email about updated packages, but this one fixes 
a potentially serious issue.

re: http://www.phpbb.com/phpBB/viewtopic.php?f=14&t=288194

A high risk bbcode.php vulnerability is patched with this version, at the
very least please patch it via the link above.  It was discovered by
Papados and patched by myself.  In agreement with phpbb.com, we'll
(CastleCops) release the full details in five days.  A CVE has been
obtained.

Alt Src: http://isc.sans.org/diary.php?date=2005-05-07

-- 
Sincerely,

Paul Laudanski .. Computer Cops, LLC.
Microsoft MVP Windows-Security 2005
CastleCops(SM)... http://castlecops.com
MVP Blog http://msmvps.com/castlecops
CCW Wiki http://wiki.castlecops.com

BHO/TB CLSIDs: http://castlecops.com/CLSID.html
LSPs: http://castlecops.com/LSPs.html
O23s: http://castlecops.com/O23.html
O9s: http://castlecops.com/O9.html
StartupList: http://castlecops.com/StartupList.html


________ Information from Computer Cops, L.L.C. ________
This message was checked by NOD32 Antivirus System for Linux Mail Server.

  part000.txt - is OK
http://castlecops.com
 
 


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