full-disclosure - [ GLSA 200605-10 ] pdnsd: Denial of Service and potential arbitrary code execution

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Message-ID: <200605100702.32861.jaervosz@gentoo.org>
Date: Wed May 10 06:03:03 2006
From: jaervosz at gentoo.org (Sune Kloppenborg Jeppesen)
Subject: [ GLSA 200605-10 ] pdnsd: Denial of Service and
	potential arbitrary code execution

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Gentoo Linux Security Advisory                           GLSA 200605-10
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                                            http://security.gentoo.org/
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  Severity: High
     Title: pdnsd: Denial of Service and potential arbitrary code
            execution
      Date: May 10, 2006
      Bugs: #131341
        ID: 200605-10

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Synopsis
========

pdnsd is vulnerable to a buffer overflow that may result in arbitrary
code execution.

Background
==========

pdnsd is a proxy DNS server with permanent caching that is designed to
cope with unreachable DNS servers.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  net-dns/pdnsd       < 1.2.4                              >= 1.2.4

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

The pdnsd team has discovered an unspecified buffer overflow
vulnerability. The PROTOS DNS Test Suite, by the Oulu University Secure
Programming Group (OUSPG), has also revealed a memory leak error within
the handling of the QTYPE and QCLASS DNS queries, leading to
consumption of large amounts of memory.

Impact
======

An attacker can craft malicious DNS queries leading to a Denial of
Service, and potentially the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All pdnsd users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-dns/pdnsd-1.2.4-r1"

References
==========

  [ 1 ] CVE-2006-2076
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2076
  [ 2 ] CVE-2006-2077
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2077

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

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

  http://security.gentoo.org/glsa/glsa-200605-10.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 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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