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AUSCERT External Security Bulletin Redistribution
ESB-2007.0336 -- [UNIX/Linux]
Apache mod_security: Rule bypass
18 May 2007
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AusCERT Security Bulletin Summary
---------------------------------
Product: mod_security
Publisher: Gentoo
Operating System: Gentoo Linux
UNIX variants (UNIX, Linux, OSX)
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2007-1359
Original Bulletin: http://security.gentoo.org/glsa/glsa-200705-17.xml
Comment: This advisory references vulnerabilities in products which run on
platforms other than Gentoo. It is recommended that administrators
running mod_security check for an updated version of the software
for their operating system.
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Gentoo Linux Security Advisory GLSA 200705-17
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http://security.gentoo.org/
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Severity: Low
Title: Apache mod_security: Rule bypass
Date: May 17, 2007
Bugs: #169778
ID: 200705-17
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Synopsis
========
A vulnerability has been discovered in mod_security, allowing a remote
attacker to bypass rules.
Background
==========
mod_security is an Apache module designed for enhancing the security of
the Apache web server.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-www/mod_security < 2.1.1 >= 2.1.1
Description
===========
Stefan Esser discovered that mod_security processes NULL characters as
terminators in POST requests using the
application/x-www-form-urlencoded encoding type, while other parsers
used in web applications do not.
Impact
======
A remote attacker could send a specially crafted POST request, possibly
bypassing the module ruleset and leading to the execution of arbitrary
code in the scope of the web server with the rights of the user running
the web server.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All mod_security users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-www/mod_security-2.1.1"
References
==========
[ 1 ] CVE-2007-1359
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1359
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200705-17.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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