[ GLSA 200506-22 ] sudo: Arbitrary command execution

[Sune Kloppenborg Jeppesen]

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Gentoo Linux Security Advisory GLSA 200506-22
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http://security.gentoo.org/
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Severity: Normal
Title: sudo: Arbitrary command execution
Date: June 23, 2005
Bugs: #96618
ID: 200506-22

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Synopsis
========

A vulnerability in sudo may allow local users to elevate 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 < 1.6.8_p9 >= 1.6.8_p9

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

The sudoers file is used to define the actions sudo users are permitted
to perform. Charles Morris discovered that a specific layout of the
sudoers file could cause the results of an internal check to be
clobbered, leaving sudo vulnerable to a race condition.

Impact
======

Successful exploitation would permit a local sudo user to execute
arbitrary commands as another user.

Workaround
==========

Reorder the sudoers file using the visudo utility to ensure the 'ALL'
pseudo-command precedes other command definitions.

Resolution
==========

All sudo users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/sudo-1.6.8_p9"

References
==========

[ 1 ] Sudo Announcement
http://www.sudo.ws/sudo/alerts/path_race.html

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

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

http://security.gentoo.org/glsa/glsa-200506-22.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 2005 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/2.0

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