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[gentoo-announce] [ GLSA 201309-03 ] Xlockmore: Denial of Service

Posted on 02 September 2013
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201309-03
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http://security.gentoo.org/
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Severity: Normal
Title: Xlockmore: Denial of Service
Date: September 02, 2013
Bugs: #255229, #440776, #477328
ID: 201309-03

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Synopsis
========
A buffer overflow in Xlockmore might allow remote attackers to cause a
Denial of Service.

Background
==========
Xlockmore is just another screensaver application for X.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 x11-misc/xlockmore < 5.43 >= 5.43

Description
===========
A Denial of Service flaw was found in the way Xlockmore performed
the passing of arguments to the underlying localtime() call, when the
'dlock' mode was used.

Impact
======
A local attacker could possibly cause a Denial of Service condition and
potentially obtain unauthorized access to the graphical session,
previously locked by another user.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
All Xlockmore users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-misc/xlockmore-5.43"

References
==========
[ 1 ] CVE-2012-4524
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4524
[ 2 ] CVE-2013-4143
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4143

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

http://security.gentoo.org/glsa/glsa-201309-03.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 2013 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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