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[gentoo-announce] [ GLSA 200902-01 ] sudo: Privilege escalation

Posted on 07 February 2009
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 200902-01
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http://security.gentoo.org/
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Severity: High
Title: sudo: Privilege escalation
Date: February 06, 2009
Bugs: #256633
ID: 200902-01

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Synopsis
========
A vulnerability in sudo may allow for privilege escalation.

Background
==========
sudo allows a system administrator to give users the ability to run
commands as other users.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-admin/sudo < 1.7.0 >= 1.7.0

Description
===========
Harald Koenig discovered that sudo incorrectly handles group
specifications in Runas_Alias (and related) entries when a group is
specified in the list (using %group syntax, to allow a user to run
commands as any member of that group) and the user is already a member
of that group.

Impact
======
A local attacker could possibly run commands as an arbitrary system
user (including root).

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

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

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/sudo-1.7.0"

References
==========
[ 1 ] CVE-2009-0034
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0034

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

http://security.gentoo.org/glsa/glsa-200902-01.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 2009 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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