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[gentoo-announce] [ GLSA 200711-02 ] OpenSSH: Security bypass

Posted on 02 November 2007
Gentoo-announce

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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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