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

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Message-ID: <4977A25F.3070309@gentoo.org>
Date: Wed, 21 Jan 2009 23:31:59 +0100
From: Pierre-Yves Rofes <py@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ 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@...too.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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