GLSA 200504-25: Rootkit Hunter: Insecure temporary file
Posted on: 04/26/2005 05:34 PM

A Rootkit Hunter security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200504-25
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http://security.gentoo.org/
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Severity: Normal
Title: Rootkit Hunter: Insecure temporary file creation
Date: April 26, 2005
Bugs: #90007
ID: 200504-25

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Synopsis
=======

Rootkit Hunter is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.

Background
=========

Rootkit Hunter is a scanning tool to detect rootkits, backdoors and local exploits on a local machine. Rootkit Hunter uses downloaded data files to check file integrity. These files are updated via the check_update.sh script.

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

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Package / Vulnerable / Unaffected
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1 app-forensics/rkhunter lt; 1.2.3-r1 gt;= 1.2.3-r1

Description
==========

Sune Kloppenborg Jeppesen and Tavis Ormandy of the Gentoo Linux Security Team have reported that the check_update.sh script and the main rkhunter script insecurely creates several temporary files with predictable filenames.

Impact
=====

A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When rkhunter or the check_update.sh script runs, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All Rootkit Hunter users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-forensics/rkhunter-1.2.3-r1"

References
=========

[ 1 ] CAN-2005-1270
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1270

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

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

http://security.gentoo.org/glsa/glsa-200504-25.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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