- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 201405-19
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: MCrypt: User-assisted execution of arbitrary code
     Date: May 18, 2014
     Bugs: #434112, #440778
       ID: 201405-19

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

Synopsis
=======
Multiple vulnerabilities have been found in MCrypt, allowing attackersto 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:

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

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/