[gentoo-announce] [ GLSA 200808-02 ] Net-SNMP: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200808-02

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http://security.gentoo.org/

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Severity: Normal

Title: Net-SNMP: Multiple vulnerabilities

Date: August 06, 2008

Bugs: #222265, #225105

ID: 200808-02

 

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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 < 5.4.1.1 >= 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 ">=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 ( -at -) 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