full-disclosure - [ GLSA 201009-02 ] Maildrop: privilege escalation

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Date: Mon, 06 Sep 2010 23:03:25 +0200
From: Pierre-Yves Rofes <py@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 201009-02 ] Maildrop: privilege escalation

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Gentoo Linux Security Advisory                           GLSA 201009-02
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Maildrop: privilege escalation
      Date: September 06, 2010
      Bugs: #308043
        ID: 201009-02

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Synopsis
========

Insecure permission handling in maildrop might allow local attackers to
elevate their privileges.

Background
==========

maildrop is the mail filter/mail delivery agent that is used by the
Courier Mail Server.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  mail-filter/maildrop       < 2.4.2                       >= 2.4.2

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

Christoph Anton Mitterer reported that maildrop does not properly drop
its privileges when run as root.

Impact
======

A local attacker could create a specially crafted .mailfilter file,
possibly leading to the execution of arbitrary commands with the "root"
group privileges. NOTE: Successful exploitation requires that maildrop
is run as root with the -d option.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All maildrop users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-filter/maildrop-2.4.2"

References
==========

  [ 1 ] CVE-2010-0301
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0301

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

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

  http://security.gentoo.org/glsa/glsa-201009-02.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@...too.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2010 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/2.5

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