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Category:   Application (E-mail Server)  >   Mailman Vendors:   GNU [multiple authors]
Mailman List Software Input Validation Flaw in 'email' Variable Allows Remote Users to Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1005987
SecurityTracker URL:  http://securitytracker.com/id/1005987
CVE Reference:   CVE-2003-0038   (Links to External Site)
Updated:  Jun 13 2008
Original Entry Date:  Jan 24 2003
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.1
Description:   An input validation vulnerability was reported in the Mailman mailing list distribution software. A remote user can conduct cross-site scripting attacks against Mailman users and administrators.

It is reported that the 'email' variable on the web interface is not properly filtered to remove HTML code from user-supplied input. 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 Mailman web interface 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:

https://[target]:443/mailman/options/yourlist?
language=en&email=<SCRIPT>alert('Can%20Cross%20Site%20Attack')</SCRIPT>

It is also reported that the default error page does not properly filter user-supplied input. A demonstration exploit URL is provided:

https://[target]:443//mailman/options/yourlist?
language=<SCRIPT>alert('Can%20Cross%20Site%20Attack')</SCRIPT>

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Mailmain 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.
Solution:   The vendor has issued a fix (xss-2.1.0-patch), available at:

http://sourceforge.net/project/showfiles.php?group_id=103

The vendor's advisory is available at:

http://mail.python.org/pipermail/mailman-announce/2003-January/000054.html

Vendor URL:  www.gnu.org/software/mailman/mailman.html (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
(Gentoo Issues Fix) Re: Mailman List Software Input Validation Flaw in 'email' Variable Allows Remote Users to Conduct Cross-Site Scripting Attacks   (Daniel Ahlberg <aliz@gentoo.org>)
Gentoo Linux has issued a fix.
Feb 9 2004 (Debian Issues Fix) Mailman List Software Input Validation Flaw in 'email' Variable Allows Remote Users to Conduct Cross-Site Scripting Attacks   (Matt Zimmerman <mdz@debian.org>)
This Debian fix contains a flaw and has been superceded by a new fix DSA 436-2.
Feb 22 2004 (Debian Issues Revised Fix) Mailman List Software Input Validation Flaw in 'email' Variable Allows Remote Users to Conduct Cross-Site Scripting Attacks   (Matt Zimmerman <mdz@debian.org>)
Debian has released a revised fix to correct a flaw contained in the previous (DSA 436-1) fix.



 Source Message Contents

Date:  24 Jan 2003 14:35:07 -0000
Subject:  Mailman: cross-site scripting bug




Product: Mailman
Affected Version: 2.1 not other version has been tested
Vendor's URL: http://www.gnu.org/software/mailman/
Solution: TBC
Author: Manuel Rodriguez

Introduction:
------------
Mailman is software to help manage electronic mail discussion lists, much 
like Majordomo or Smartmail.  And Mailman have web interface systems.


Example:
-----------------
This is a simple example for version 2.1:

1) With mailman options the email variable is vulnerable to cross-site 
scripting.

You can recognise the vulnerabilities with this type of URL:

https://www.yourserver.com:443/mailman/options/yourlist?
language=en&email=&lt;SCRIPT&gt;alert('Can%20Cross%20Site%20Attack')&lt;/SCRIPT&gt; 
and that prove that any (malicious) script code is possible on web 
interface part of Mailman.

2) The default error page mailman generates does not adequately filter its 
input making it susceptible to cross-site scripting.

https://www.yourserver.com:443//mailman/options/yourlist?
language=&lt;SCRIPT&gt;alert('Can%20Cross%20Site%20Attack')&lt;/SCRIPT&gt;

 
 


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