U radu programskog paketa Asterisk uočeno je više sigurnosnih propusta koji udaljenim napadačima omogućuju izvođenje DoS napada, izvršavanje proizvoljnog programskog koda ili zaobilaženje postavljenih ograničenja.

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Gentoo Linux Security Advisory                           GLSA 201209-15
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: Asterisk: Multiple vulnerabilities
     Date: September 26, 2012
     Bugs: #425050, #433750
       ID: 201209-15

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Synopsis
========

Multiple vulnerabilities have been found in Asterisk, the worst of
which may allow execution of arbitrary code.

Background
==========

Asterisk is an open source telephony engine and toolkit.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/asterisk           < 1.8.15.1               >= 1.8.15.1

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

Multiple vulnerabilities have been found in Asterisk:

* An error in manager.c allows shell access (CVE-2012-2186).
* An error in Asterisk could cause all RTP ports to be exhausted
  (CVE-2012-3812).
* A double-free error could occur when two parties attempt to
  manipulate the same voicemail account simultaneously (CVE-2012-3863).
* Asterisk does not properly implement certain ACL rules
  (CVE-2012-4737).

Impact
======

A remote, authenticated attacker could execute arbitrary code with the
privileges of the process, cause a Denial of Service condition, or
bypass outbound call restrictions.

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-1.8.15.1"

References
==========

[ 1 ] CVE-2012-2186
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2186
[ 2 ] CVE-2012-3812
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3812
[ 3 ] CVE-2012-3863
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3863
[ 4 ] CVE-2012-4737
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4737

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

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

 http://security.gentoo.org/glsa/glsa-201209-15.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