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Gentoo Linux Security Advisory                           GLSA 201405-16
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                                            https://security.gentoo.org/
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 Severity: Normal
    Title: Mono: Denial of Service
     Date: May 18, 2014
     Bugs: #433768
       ID: 201405-16

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Synopsis
=======
A hash collision vulnerability in Mono allows remote attackers to cause
a Denial of Service condition.

Background
=========
Mono is an open source implementation of Microsoft's .NET Framework.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-lang/mono              < 2.10.9-r2              >= 2.10.9-r2 

Description
==========
Mono does not properly randomize hash functions for form posts to
protect against hash collision attacks.

Impact
=====
A remote attacker could send specially crafted parameters, possibly
resulting in a Denial of Service condition.

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

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

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-lang/mono-2.10.9-r2"

References
=========
[ 1 ] CVE-2012-3543
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3543

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

 https://security.gentoo.org/glsa/201405-16

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 2014 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/