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[ GLSA 200901-15 ] Net-SNMP: Denial of Service

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Gentoo Linux Security Advisory                           GLSA 200901-15
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Net-SNMP: Denial of Service
      Date: January 21, 2009
      Bugs: #245306
        ID: 200901-15

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Synopsis
========

A vulnerability in Net-SNMP could lead to a Denial of Service.

Background
==========

Net-SNMP is a collection of tools for generating and retrieving SNMP
data.

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

    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  net-analyzer/net-snmp      < 5.4.2.1                   >= 5.4.2.1

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

Oscar Mira-Sanchez reported an integer overflow in the
netsnmp_create_subtree_cache() function in agent/snmp_agent.c when
processing GETBULK requests.

Impact
======

A remote attacker could send a specially crafted request to crash the
SNMP server. NOTE: The attacker needs to know the community string to
exploit this vulnerability.

Workaround
==========

Restrict access to trusted entities only.

Resolution
==========

All Net-SNMP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-5.4.2.1"

References
==========

  [ 1 ] CVE-2008-4309
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4309

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

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

  http://security.gentoo.org/glsa/glsa-200901-15.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 2009 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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• [ GLSA 200901-15 ] Net-SNMP: Denial of Service Pierre-Yves Rofes (Jan 22)