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Posted on 04 April 2007
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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 < 1.4.4 >= 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 ">=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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