GLSA 200704-03 OpenAFS: Privilege escalation
Posted on: 04/04/2007 12:10 AM

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

Gentoo Linux Security Advisory GLSA 200704-03
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http://security.gentoo.org/
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Severity: High
Title: OpenAFS: Privilege escalation
Date: April 03, 2007
Bugs: #171662
ID: 200704-03

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Synopsis
========

OpenAFS is subject to a design flaw that could allow privilege
escalation on the client.

Background
==========

OpenAFS is a distributed network filesystem.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-fs/openafs lt; 1.4.4 gt;= 1.4.4

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

Benjamin Bennett discovered that the OpenAFS client contains a design
flaw where cache managers do not use authenticated server connections
when performing actions not requested by a user.

Impact
======

If setuid is enabled on the client cells, an attacker can supply a fake
FetchStatus reply that sets setuid and root ownership of a file being
executed. This could provide root access on the client. Remote attacks
may be possible if an attacker can entice a user to execute a known
file. Note that setuid is enabled by default in versions of OpenAFS
prior to 1.4.4.

Workaround
==========

Disable the setuid functionality on all client cells. This is now the
default configuration in OpenAFS.

Resolution
==========

All OpenAFS users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-fs/openafs-1.4.4"

References
==========

[ 1 ] CVE-2007-1507
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1507

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

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

http://security.gentoo.org/glsa/glsa-200704-03.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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