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Gentoo Linux Security Advisory GLSA 200907-04
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http://security.gentoo.org/
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Severity: High
Title: Apache: Multiple vulnerabilities
Date: July 12, 2009
Bugs: #268154, #271470, #276426, #276792
ID: 200907-04
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Synopsis
========
Multiple vulnerabilities in the Apache HTTP daemon allow for local
privilege escalation, information disclosure or Denial of Service
attacks.
Background
==========
The Apache HTTP server is one of the most popular web servers on the
Internet.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-servers/apache < 2.2.11-r2 >= 2.2.11-r2
Description
===========
Multiple vulnerabilities have been discovered in the Apache HTTP
server:
* Jonathan Peatfield reported that the "Options=IncludesNoEXEC"
argument to the "AllowOverride" directive is not processed properly
(CVE-2009-1195).
* Sander de Boer discovered that the AJP proxy module (mod_proxy_ajp)
does not correctly handle POST requests that do not contain a request
body (CVE-2009-1191).
* The vendor reported that the HTTP proxy module (mod_proxy_http),
when being used as a reverse proxy, does not properly handle requests
containing more data as stated in the "Content-Length" header
(CVE-2009-1890).
* Francois Guerraz discovered that mod_deflate does not abort the
compression of large files even when the requesting connection is
closed prematurely (CVE-2009-1891).
Impact
======
A local attacker could circumvent restrictions put up by the server
administrator and execute arbitrary commands with the privileges of the
user running the Apache server. A remote attacker could send multiple
requests to a server with the AJP proxy module, possibly resulting in
the disclosure of a request intended for another client, or cause a
Denial of Service by sending specially crafted requests to servers
running mod_proxy_http or mod_deflate.
Workaround
==========
Remove "include", "mod_proxy_ajp", "mod_proxy_http" and "deflate" from
APACHE2_MODULES in make.conf and rebuild Apache, or disable the
aforementioned modules in the Apache configuration.
Resolution
==========
All Apache users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-servers/apache-2.2.11-r2"
References
==========
[ 1 ] CVE-2009-1195
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1195
[ 2 ] CVE-2009-1191
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1191
[ 3 ] CVE-2009-1890
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1890
[ 4 ] CVE-2009-1891
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1891
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200907-04.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@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2009 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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