GLSA 200505-06: TCPDump: Decoding routines Denial of Service

Posted by Philipp Esselbach on: 05/09/2005 02:47 PM [ Print | 0 comment(s) ]

A TCPDump security update has been released for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200505-06
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http://security.gentoo.org/
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Severity: Normal
Title: TCPDump: Decoding routines Denial of Service vulnerability
Date: May 09, 2005
Bugs: #90541
ID: 200505-06

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Synopsis
=======

A flaw in the decoding of network packets renders TCPDump vulnerable to a remote Denial of Service attack.

Background
=========

TCPDump is a tool for network monitoring and data acquisition.

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

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Package / Vulnerable / Unaffected
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1 net-analyzer/tcpdump lt; 3.8.3-r2 gt;= 3.8.3-r2

Description
==========

TCPDump improperly handles and decodes ISIS, BGP, LDP (CAN-2005-1279) and RSVP (CAN-2005-1280) packets. TCPDump might loop endlessly after receiving malformed packets.

Impact
=====

A malicious remote attacker can exploit the decoding issues for a Denial of Service attack by sending specially crafted packets, possibly causing TCPDump to loop endlessly.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All TCPDump users should upgrade to the latest available version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-analyzer/tcpdump-3.8.3-r2"

References
=========

[ 1 ] CAN-2005-1279
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name
05-1279
[ 2 ] CAN-2005-1280
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name
05-1280

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

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

http://security.gentoo.org/glsa/glsa-200505-06.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 2005 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/2.0