Home / mailings [gentoo-announce] [ GLSA 200705-14 ] XScreenSaver: Privilege escalation
Posted on 13 May 2007
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Gentoo Linux Security Advisory GLSA 200705-14
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http://security.gentoo.org/
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Severity: Normal
Title: XScreenSaver: Privilege escalation
Date: May 13, 2007
Bugs: #176584
ID: 200705-14
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Synopsis
========
XScreenSaver allows local users to bypass authentication under certain
configurations.
Background
==========
XScreenSaver is a widely used screen saver collection shipped on
systems running the X11 Window System.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 x11-misc/xscreensaver < 5.02 >= 5.02
Description
===========
XScreenSaver incorrectly handles the results of the getpwuid() function
in drivers/lock.c when using directory servers during a network outage.
Impact
======
A local user can crash XScreenSaver by preventing network connectivity
if the system uses a remote directory service for credentials such as
NIS or LDAP, which will unlock the screen.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All XScreenSaver users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-misc/xscreensaver-5.02"
References
==========
[ 1 ] CVE-2007-1859
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1859
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200705-14.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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