[ GLSA 200512-05 ] Xmail: Privilege escalation through sendmail

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200512-05
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Xmail: Privilege escalation through sendmail
      Date: December 14, 2005
      Bugs: #109381
        ID: 200512-05

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Synopsis
========

The sendmail program in Xmail is vulnerable to a buffer overflow,
potentially resulting in local privilege escalation.

Background
==========

Xmail is an Internet and intranet mail server.

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

    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  mail-mta/xmail       < 1.22                               >= 1.22

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

iDEFENSE reported that the AddressFromAtPtr function in the sendmail
program fails to check bounds on arguments passed from other functions,
and as a result an exploitable stack overflow condition occurs when
specifying the "-t" command line option.

Impact
======

A local attacker can make a malicious call to sendmail, potentially
resulting in code execution with elevated privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Xmail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=mail-mta/xmail-1.22"

References
==========

  [ 1 ] CVE-2005-2943
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2943
  [ 2 ] iDEFENSE Security Advisory

http://www.idefense.com/application/poi/display?id=321&type=vulnerabilities&flashstatus=true

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

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

  http://security.gentoo.org/glsa/glsa-200512-05.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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