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[gentoo-announce] [ GLSA 201203-06 ] sudo: Privilege escalation

Posted on 06 March 2012
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201203-06
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http://security.gentoo.org/
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Severity: High
Title: sudo: Privilege escalation
Date: March 06, 2012
Bugs: #351490, #401533
ID: 201203-06

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Synopsis
========
Two vulnerabilities have been discovered in sudo, allowing local
attackers to possibly gain escalated privileges.

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 < 1.8.3_p2 >= 1.8.3_p2
*>= 1.7.4_p5

Description
===========
Two vulnerabilities have been discovered in sudo:

* When the sudoers file is configured with a Runas group, sudo does not
prompt for a password when changing to the new group (CVE-2011-0010).
* A format string vulnerability exists in the "sudo_debug()" function
(CVE-2012-0809).

Impact
======
A local attacker could possibly gain the ability to run arbitrary
commands with the privileges of other users or groups, 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-1.8.3_p2"

References
==========
[ 1 ] CVE-2011-0010
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0010
[ 2 ] CVE-2012-0809
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0809

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

http://security.gentoo.org/glsa/glsa-201203-06.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 2012 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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