Otklonjena su dva sigurnosna propusta u radu programskog paketa Asterisk. Udaljenim napadačima omogućuju proizvoljno izvršavanje programskog koda ili izvođenje napada uskraćivanjem usluge (DoS).

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Gentoo Linux Security Advisory                           GLSA 201203-21
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                                            http://security.gentoo.org/
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 Severity: High
    Title: Asterisk: Multiple vulnerabilities
     Date: March 28, 2012
     Bugs: #408431
       ID: 201203-21

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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           < 1.8.10.1               >= 1.8.10.1

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

Two vulnerabilities have been found in Asterisk:

* The "milliwatt_generate()" function in app_milliwatt.c is vulnerable
  to a stack overrun (AST-2012-002).
* The "ast_parse_digest()" function in utils.c is vulnerable to a
  stack-based buffer overflow (AST-2012-003).

Impact
======

A remote unauthenticated attacker could execute arbitrary code 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-1.8.10.1"

References
==========

[ 1 ] AST-2012-002
      http://downloads.asterisk.org/pub/security/AST-2012-002.txt
[ 2 ] AST-2012-003
      http://downloads.asterisk.org/pub/security/AST-2012-003.txt
[ 3 ] CVE-2012-1183
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1183
[ 4 ] CVE-2012-1184
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1184

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

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

 http://security.gentoo.org/glsa/glsa-201203-21.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