GLSA 200506-10: LutelWall: Insecure temporary file creation
Posted on: 06/12/2005 03:20 AM

A LutelWall security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200506-10
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http://security.gentoo.org/
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Severity: Normal
Title: LutelWall: Insecure temporary file creation
Date: June 11, 2005
Bugs: #95378
ID: 200506-10

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Synopsis
=======

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

Background
=========

LutelWall is a high-level Linux firewall configuration tool.

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

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Package / Vulnerable / Unaffected
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1 net-firewall/lutelwall lt; 0.98 gt;= 0.98

Description
==========

Eric Romang has discovered that the new_version_check() function in LutelWall insecurely creates a temporary file when updating to a new version.

Impact
=====

A local attacker could create symbolic links in the temporary file directory, pointing to a valid file somewhere on the filesystem. When the update script is executed (usually by the root user), this would result in the file being overwritten with the rights of this user.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All LutelWall users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-firewall/lutelwall-0.98"

References
=========

[ 1 ] CAN-2005-1879
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1879

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

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

http://security.gentoo.org/glsa/glsa-200506-10.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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