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TUCoPS :: Linux :: Gentoo :: b06-2115.htm

Pdnsd: denial of service and potential arbitrary code execution



pdnsd: Denial of Service and potential arbitrary code execution
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@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 

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