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Linux Compatible » News » August 2008 » GLSA 200808-02 Net-SNMP: Multiple vulnerabilities

GLSA 200808-02 Net-SNMP: Multiple vulnerabilities

Posted by Bob on: 08/06/2008 01:45 AM [ Print | 0 comment(s) ]

A new security update has been released for Gentoo Linux - Net-SNMP: Multiple vulnerabilities. Here the announcement:




Gentoo Linux Security Advisory GLSA 200808-02
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http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: Net-SNMP: Multiple vulnerabilities
Date: August 06, 2008
Bugs: #222265, #225105
ID: 200808-02

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Multiple vulnerabilities in Net-SNMP allow for authentication bypass in
snmpd and execution of arbitrary code in Perl applications using
Net-SMNP.

Background
==========

Net-SNMP is a collection of tools for generating and retrieving SNMP
data. The SNMPv3 protocol uses a keyed-Hash Message Authentication Code
(HMAC) to verify data integrity and authenticity of SNMP messages.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-analyzer/net-snmp lt; 5.4.1.1 gt;= 5.4.1.1

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

Wes Hardaker reported that the SNMPv3 HMAC verification relies on the
client to specify the HMAC length (CVE-2008-0960). John Kortink
reported a buffer overflow in the Perl bindings of Net-SNMP when
processing the OCTETSTRING in an attribute value pair (AVP) received by
an SNMP agent (CVE-2008-2292).

Impact
======

An attacker could send SNMPv3 packets to an instance of snmpd providing
a valid user name and an HMAC length value of 1, and easily conduct
brute-force attacks to bypass SNMP authentication. An attacker could
further entice a user to connect to a malicious SNMP agent with an SNMP
client using the Perl bindings, possibly resulting in the execution of
arbitrary code.

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 "gt;=net-analyzer/net-snmp-5.4.1.1"

References
==========

[ 1 ] CVE-2008-0960
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0960
[ 2 ] CVE-2008-2292
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2292

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

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

http://security.gentoo.org/glsa/glsa-200808-02.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 2008 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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