Izdana je nova nadogradnja koja rješava više sigurnosnih propusta u radu programskog paketa Asterisk. Spomenute nedostatke udaljeni napadač može iskoristiti za izvođenje DoS (eng. Denial of Service) napada ili pokretanje proizvoljnog programskog koda.

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Gentoo Linux Security Advisory                           GLSA 201206-05
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: Asterisk: Multiple vulnerabilities
     Date: June 21, 2012
     Bugs: #413353, #418189, #418191
       ID: 201206-05

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Synopsis
========

Multiple vulnerabilities in Asterisk might allow remote attackers to
execute arbitrary code.

Background
==========

Asterisk is an open source telephony engine and toolkit.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/asterisk           < 1.8.12.1               >= 1.8.12.1

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

Multiple vulnerabilities have been found in Asterisk:

* An error in manager.c allows shell access through the MixMonitor
  application, GetVar, or Status (CVE-2012-2414).
* An error in chan_skinny.c could cause a heap-based buffer overflow
  (CVE-2012-2415).
* An error in chan_sip.c prevents Asterisk from checking if a channel
  exists before connected line updates (CVE-2012-2416).
* An error in chan_iax2.c may cause an invalid pointer to be called
  (CVE-2012-2947).
* chan_skinny.c contains a NULL pointer dereference (CVE-2012-2948).

Impact
======

A remote attacker could execute arbitrary code with the privileges of
the process or cause a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Asterisk users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.8.12.1"

References
==========

[ 1 ] CVE-2012-2414
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2414
[ 2 ] CVE-2012-2415
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2415
[ 3 ] CVE-2012-2416
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2416
[ 4 ] CVE-2012-2947
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2947
[ 5 ] CVE-2012-2948
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2948

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

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

 http://security.gentoo.org/glsa/glsa-201206-05.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
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License
=======

Copyright 2012 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