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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