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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200808-02">
<title>Net-SNMP: Multiple vulnerabilities</title>
Multiple vulnerabilities in Net-SNMP allow for authentication bypass in
snmpd and execution of arbitrary code in Perl applications using Net-SMNP.
<product type="ebuild">net-snmp</product>
<announced>August 06, 2008</announced>
<revised>August 06, 2008: 01</revised>
<package name="net-analyzer/net-snmp" auto="yes" arch="*">
<unaffected range="ge"></unaffected>
<vulnerable range="lt"></vulnerable>
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.
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 type="normal">
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.
There is no known workaround at this time.
All Net-SNMP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-analyzer/net-snmp-;</code>
<uri link="">CVE-2008-0960</uri>
<uri link="">CVE-2008-2292</uri>
<metadata tag="requester" timestamp="Wed, 02 Jul 2008 11:15:36 +0000">
<metadata tag="bugReady" timestamp="Fri, 04 Jul 2008 13:09:07 +0000">
<metadata tag="submitter" timestamp="Mon, 07 Jul 2008 08:46:03 +0000">