[ GLSA 200711-02 ] OpenSSH: Security bypass

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

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Gentoo Linux Security Advisory                           GLSA 200711-02
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: OpenSSH: Security bypass
      Date: November 01, 2007
      Bugs: #191321
        ID: 200711-02

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Synopsis
========

A flaw has been discovered in OpenSSH which could allow a local
attacker to bypass security restrictions.

Background
==========

OpenSSH is a complete SSH protocol implementation that includes an SFTP
client and server support.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  net-misc/openssh        < 4.7                              >= 4.7

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

Jan Pechanec discovered that OpenSSH uses a trusted X11 cookie when it
cannot create an untrusted one.

Impact
======

An attacker could bypass the SSH client security policy and gain
privileges by causing an X client to be treated as trusted.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSH users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/openssh-4.7"

References
==========

  [ 1 ] CVE-2007-4752
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4752

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

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

  http://security.gentoo.org/glsa/glsa-200711-02.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
http://bugs.gentoo.org.

License
=======

Copyright 2007 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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