[ GLSA 201009-02 ] Maildrop: privilege escalation

[Pierre-Yves Rofes <py () gentoo org>]

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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 () gentoo 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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