[ GLSA 200711-31 ] Net-SNMP: Denial of Service

From: Pierre-Yves Rofes <py@gentoo.org>
To: gentoo-announce@gentoo.org
Cc: full-disclosure@lists.grok.org.uk,bugtraq@securityfocus.com,security-alerts@linuxsecurity.com
Subject: [ GLSA 200711-31 ] Net-SNMP: Denial of Service
Date:


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Gentoo Linux Security Advisory                           GLSA 200711-31
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Net-SNMP: Denial of Service
      Date: November 20, 2007
      Bugs: #198346
        ID: 200711-31

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Synopsis
========

A Denial of Service vulnerability has been discovered in Net-SNMP when
processing GETBULK requests.

Background
==========

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

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

    -------------------------------------------------------------------
     Package                /  Vulnerable  /                Unaffected
    -------------------------------------------------------------------
  1  net-analyzer/net-snmp     < 5.4.1-r1                  >= 5.4.1-r1

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

The SNMP agent (snmpd) does not properly handle GETBULK requests with
an overly large "max-repetitions" field.

Impact
======

A remote unauthenticated attacker could send a specially crafted SNMP
request to the vulnerable application, possibly resulting in a high CPU
and memory consumption.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

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

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-5.4.1-r1"

References
==========

  [ 1 ] CVE-2007-5846
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5846

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

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

  http://security.gentoo.org/glsa/glsa-200711-31.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 2007 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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