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TUCoPS :: Web :: Apache :: bx3714.htm

Apache: Denial of Service



Apache: Denial of Service
Apache: Denial of Service



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Gentoo Linux Security Advisory                           GLSA 200807-06
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: Apache: Denial of Service
      Date: July 09, 2008
      Bugs: #222643, #227111
        ID: 200807-06

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Synopsis
=======
Multiple vulnerabilities in Apache might lead to a Denial of Service.

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       < 2.2.9                         >= 2.2.9

Description
==========
Multiple vulnerabilities have been discovered in Apache:

* Dustin Kirkland reported that the mod_ssl module can leak memory
  when the client reports support for a compression algorithm
  (CVE-2008-1678).

* Ryujiro Shibuya reported that the ap_proxy_http_process_response()
  function in the mod_proxy module does not limit the number of
  forwarded interim responses (CVE-2008-2364).

* sp3x of SecurityReason reported a Cross-Site Request Forgery
  vulnerability in the balancer-manager in the mod_proxy_balancer
  module (CVE-2007-6420).

Impact
=====
A remote attacker could exploit these vulnerabilities by connecting to
an Apache httpd, by causing an Apache proxy server to connect to a
malicious server, or by enticing a balancer administrator to connect to
a specially-crafted URL, resulting in a Denial of Service of the Apache
daemon.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Apache users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/apache-2.2.9"

References
=========
  [ 1 ] CVE-2007-6420
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6420 
  [ 2 ] CVE-2008-1678
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1678 
  [ 3 ] CVE-2008-2364
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2364 

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

http://security.gentoo.org/glsa/glsa-200807-06.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 2008 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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