GLSA 200605-10 pdnsd: Denial of Service and potential arbitrary code execution

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 lt; 1.2.4 gt;= 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 "gt;=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@gentoo.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