Home / mailings [gentoo-announce] [ GLSA 200804-09 ] am-utils: Insecure temporary file creation
Posted on 10 April 2008
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Gentoo Linux Security Advisory GLSA 200804-09
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http://security.gentoo.org/
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Severity: Normal
Title: am-utils: Insecure temporary file creation
Date: April 10, 2008
Bugs: #210158
ID: 200804-09
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Synopsis
========
am-utils creates temporary files insecurely allowing local users to
overwrite arbitrary files via a symlink attack.
Background
==========
am-utils is a collection of utilities for use with the Berkeley
Automounter.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-fs/am-utils < 6.1.5 >= 6.1.5
Description
===========
Tavis Ormandy discovered that, when creating temporary files, the
'expn' utility does not check whether the file already exists.
Impact
======
A local attacker could exploit the vulnerability via a symlink attack
to overwrite arbitrary files.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All am-utils users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/am-utils-6.1.5"
References
==========
[ 1 ] CVE-2008-1078
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1078
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200804-09.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 2008 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
