GLSA 201003-01 sudo: Privilege escalation
Posted on: 03/03/2010 06:30 PM

A new security update has been released for Gentoo Linux - sudo: Privilege escalation. Here the announcement:

Gentoo Linux Security Advisory GLSA 201003-01
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http://security.gentoo.org/
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Severity: High
Title: sudo: Privilege escalation
Date: March 03, 2010
Bugs: #306865
ID: 201003-01

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Synopsis
========

Two vulnerabilities in sudo might allow local users to escalate
privileges and execute arbitrary code with root 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 lt; 1.7.2_p4 gt;= 1.7.2_p4

Description
===========

Multiple vulnerabilities have been discovered in sudo:

* Glenn Waller and neonsignal reported that sudo does not properly
handle access control of the "sudoedit" pseudo-command
(CVE-2010-0426).

* Harald Koenig reported that sudo does not properly set
supplementary groups when using the "runas_default" option
(CVE-2010-0427).

Impact
======

A local attacker with privileges to use "sudoedit" or the privilege to
execute commands with the "runas_default" setting enabled could
leverage these vulnerabilities to execute arbitrary code with elevated
privileges.

Workaround
==========

CVE-2010-0426: Revoke all "sudoedit" privileges, or use the full path
to sudoedit. CVE-2010-0427: Remove all occurrences of the
"runas_default" setting.

Resolution
==========

All sudo users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-admin/sudo-1.7.2_p4"

References
==========

[ 1 ] CVE-2010-0426
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0426
[ 2 ] CVE-2010-0427
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0427

Availability
============

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

http://security.gentoo.org/glsa/glsa-201003-01.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
https://bugs.gentoo.org.

License
=======

Copyright 2010 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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