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Gentoo Linux Security Advisory                           GLSA 201607-10
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Varnish: Multiple vulnerabilities
     Date: July 20, 2016
     Bugs: #542886
       ID: 201607-10

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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.

https://creativecommons.org/licenses/by-sa/2.5/