Gentoo: TCPDump Decoding routines Denial of Service
Posted by Benjamin D. Thomas   
Gentoo While working on the tcpdump issues solved in the original version of this GLSA, Simon L. Nielsen from FreeBSD Security Team discovered a similar infinite loop DoS vulnerability in the BGP handling code (CAN-2005-1267).
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Gentoo Linux Security Advisory [UPDATE]               GLSA 200505-06:02
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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
   Updated: June 12, 2005
      Bugs: #90541, #95349
        ID: 200505-06:02

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Update
======

While working on the tcpdump issues solved in the original version of
this GLSA, Simon L. Nielsen from FreeBSD Security Team discovered a
similar infinite loop DoS vulnerability in the BGP handling code
(CAN-2005-1267). New packages have been released to address this new
issue.

The updated sections appear below.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  net-analyzer/tcpdump     < 3.8.3-r3                   >= 3.8.3-r3

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

TCPDump improperly handles and decodes ISIS (CAN-2005-1278), BGP
(CAN-2005-1267, CAN-2005-1279), LDP (CAN-2005-1279) and RSVP
(CAN-2005-1280) packets. TCPDump might loop endlessly after receiving
malformed packets.

Resolution
==========

All TCPDump users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/tcpdump-3.8.3-r3"

References
==========

  [ 1 ] CAN-2005-1267
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1267
  [ 2 ] CAN-2005-1278
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1278
  [ 3 ] CAN-2005-1279
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1279
  [ 4 ] 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