Date: Thu, 08 Jul 2004 19:24:51 +0200
From: Thierry Carrez <koon@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Subject: [ GLSA 200407-07 ] Shorewall : Insecure temp file handling
Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com,
security-alerts@linuxsecurity.com
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Gentoo Linux Security Advisory GLSA 200407-07
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http://security.gentoo.org/
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Severity: Normal
Title: Shorewall : Insecure temp file handling
Date: July 08, 2004
Bugs: #55675
ID: 200407-07
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Synopsis
========
Shorewall contains a bug in the code handling the creation of temporary
files and directories. This can allow a non-root user to overwrite
arbitrary system files.
Background
==========
Shorewall is a high level tool for configuring Netfilter, the firewall
facility included in the Linux Kernel.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-firewall/shorewall <= 1.4.10c >= 1.4.10f
Description
===========
Shorewall uses temporary files and directories in an insecure manner. A
local user could create symbolic links at specific locations,
eventually overwriting other files on the filesystem with the rights of
the shorewall process.
Impact
======
An attacker could exploit this vulnerability to overwrite arbitrary
system files with root privileges, resulting in Denial of Service or
further exploitation.
Workaround
==========
There is no known workaround at this time. All users should upgrade to
the latest available version of Shorewall.
Resolution
==========
All users should upgrade to the latest available version of Shorewall,
as follows:
# emerge sync
# emerge -pv ">=net-firewall/shorewall-1.4.10f"
# emerge ">=net-firewall/shorewall-1.4.10f"
References
==========
[ 1 ] Shorewall Announcement
http://lists.shorewall.net/pipermail/shorewall-announce/2004-June/000385.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200407-07.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 2004 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/1.0
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