- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 201607-10
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                           https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: Varnish: Multiple vulnerabilities
     Date: July 20, 2016
     Bugs: #542886
       ID: 201607-10

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Improper input validation in Varnish allows remote attackers to conduct
HTTP smuggling attacks, and possibly trigger a buffer overflow.

Background
==========

Varnish is a web application accelerator.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  www-servers/varnish          < 3.0.7                    >= 3.0.7 

Description
===========

Varnish fails to properly validate input from HTTP headers, and does
not deny requests with multiple Content-Length headers.

Impact
======

Remote attackers could conduct an HTTP response splitting attack, which
may further enable them to conduct Cross-Site Scripting (XSS), Cache
Poisoning, Defacement, and Page Hijacking.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Varnish users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=www-servers/varnish-3.0.7"

References
==========

[ 1 ] CVE-2015-8852
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-8852

Availability
============

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

 https://security.gentoo.org/glsa/201607-10

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
https://bugs.gentoo.org.

License
=======

Copyright 2016 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