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Gentoo Linux Security Advisory 200505-6

Gentoo Linux Security Advisory 200505-6
Posted Jul 2, 2005
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200505-06 - TCPDump improperly handles and decodes ISIS, BGP, LDP (CVE-2005-1279) and RSVP (CVE-2005-1280) packets. TCPDump might loop endlessly after receiving malformed packets. Versions less than 3.8.3-r2 are affected.

tags | advisory
systems | linux, gentoo
advisories | CVE-2005-1279, CVE-2005-1280
SHA-256 | a2cf59b4e83e454badf30debfb23789a1f353e476a026ec94eebb61caf1cd136

Gentoo Linux Security Advisory 200505-6

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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
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-analyzer/tcpdump < 3.8.3-r2 >= 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 ">=net-analyzer/tcpdump-3.8.3-r2"

References
==========

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

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
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