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

Posted on 21 January 2009
Gentoo-announce

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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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