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Gentoo Linux Security Advisory 200907-4

Gentoo Linux Security Advisory 200907-4
Posted Jul 13, 2009
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200907-04 - Multiple vulnerabilities in the Apache HTTP daemon allow for local privilege escalation, information disclosure or Denial of Service attacks. Versions less than 2.2.11-r2 are affected.

tags | advisory, web, denial of service, local, vulnerability, info disclosure
systems | linux, gentoo
advisories | CVE-2009-1191, CVE-2009-1195, CVE-2009-1890, CVE-2009-1891
SHA-256 | abcbba587113454fb3691d9b0cc0ef52089b05b2cb5706de46212acbee55d87a

Gentoo Linux Security Advisory 200907-4

Change Mirror Download
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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@gentoo.org 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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