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Gentoo: 201405-19 MCrypt: User-assisted execution of arbitrary code Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
Gentoo Multiple vulnerabilities have been found in MCrypt, allowing attackers to execute arbitrary code or cause Denial of Service.
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Gentoo Linux Security Advisory                           GLSA 201405-19
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: MCrypt: User-assisted execution of arbitrary code
     Date: May 18, 2014
     Bugs: #434112, #440778
       ID: 201405-19

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Synopsis
========

Multiple vulnerabilities have been found in MCrypt, allowing attackers
to execute arbitrary code or cause Denial of Service.

Background
==========

MCrypt is a replacement of the old unix crypt(1) utility.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-crypt/mcrypt            < 2.6.8-r2               >= 2.6.8-r2 

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

Multiple vulnerabilities have been discovered in MCrypt:

* A boundary error in MCrypt could cause a stack-based buffer overflow
  (CVE-2012-4409).
* MCrypt contains multiple format string errors (CVE-2012-4426).
* MCrypt does not properly handle long file names, which could cause a
  stack-based buffer overflow (CVE-2012-4527).

Impact
======

A remote attacker could entice a user to open a specially crafted file
using MCrypt, possibly resulting in execution of arbitrary code with
the privileges of the process or a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MCrypt users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-crypt/mcrypt-2.6.8-r2"

References
==========

[ 1 ] CVE-2012-4409
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4409
[ 2 ] CVE-2012-4426
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4426
[ 3 ] CVE-2012-4527
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4527

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

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

 http://security.gentoo.org/glsa/glsa-201405-19.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
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.

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