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Category:   Application (E-mail Server)  >   Mailman Vendors:   GNU [multiple authors]
(Gentoo Issues Fix) Mailman Input Validation Hole in 'private.py' Discloses Files to Remote Users
SecurityTracker Alert ID:  1013147
SecurityTracker URL:  http://securitytracker.com/id/1013147
CVE Reference:   CVE-2005-0202   (Links to External Site)
Date:  Feb 10 2005
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.1 - 2.1.5
Description:   An input validation vulnerability was reported in Mailman in 'private.py'. A remote user can access arbitrary files on the target system.

The true_path() function does not properly validate user-supplied input. A remote user that is a member of a private mailman list can submit a specially crafted input value to access files on the system, including the mailman configuration files and passwords.

A demonsration exploit may contain the following string:

"/...../"

Marcus Meissner reported this flaw.

Impact:   A remote user can access arbitrary files on the target system, including the mailman configuration files with user e-mail addresses and passwords.
Solution:   Gentoo has released a fix and indicates that all Mailman users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/mailman-2.1.5-r4"

Vendor URL:  mailman.sf.net/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Gentoo)

Message History:   This archive entry is a follow-up to the message listed below.
Feb 10 2005 Mailman Input Validation Hole in 'private.py' Discloses Files to Remote Users



 Source Message Contents

Subject:  [gentoo-announce] [ GLSA 200502-11 ] Mailman: Directory traversal vulnerability


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Gentoo Linux Security Advisory                           GLSA 200502-11
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Mailman: Directory traversal vulnerability
      Date: February 10, 2005
      Bugs: #81109
        ID: 200502-11

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Synopsis
========

Mailman fails to properly sanitize input, leading to information
disclosure.

Background
==========

Mailman is a Python-based mailing list server with an extensive web
interface.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  net-mail/mailman     < 2.1.5-r4                       >= 2.1.5-r4

Description
===========

Mailman contains an error in private.py which fails to properly
sanitize input paths.

Impact
======

An attacker could exploit this flaw to obtain arbitrary files on the
web server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Mailman users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/mailman-2.1.5-r4"

References
==========

  [ 1 ] Full Disclosure Announcement
        http://lists.netsys.com/pipermail/full-disclosure/2005-February/031562.html
  [ 2 ] CAN-2005-0202
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0202

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200502-11.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0

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