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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200808-02">
<title>Net-SNMP: Multiple vulnerabilities</title>
<synopsis>
Multiple vulnerabilities in Net-SNMP allow for authentication bypass in
snmpd and execution of arbitrary code in Perl applications using Net-SMNP.
</synopsis>
<product type="ebuild">net-snmp</product>
<announced>August 06, 2008</announced>
<revised>August 06, 2008: 01</revised>
<bug>222265</bug>
<bug>225105</bug>
<access>remote</access>
<affected>
<package name="net-analyzer/net-snmp" auto="yes" arch="*">
<unaffected range="ge">5.4.1.1</unaffected>
<vulnerable range="lt">5.4.1.1</vulnerable>
</package>
</affected>
<background>
<p>
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.
</p>
</background>
<description>
<p>
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).
</p>
</description>
<impact type="normal">
<p>
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.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Net-SNMP users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-analyzer/net-snmp-5.4.1.1&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0960">CVE-2008-0960</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2292">CVE-2008-2292</uri>
</references>
<metadata tag="requester" timestamp="Wed, 02 Jul 2008 11:15:36 +0000">
keytoaster
</metadata>
<metadata tag="bugReady" timestamp="Fri, 04 Jul 2008 13:09:07 +0000">
vorlon
</metadata>
<metadata tag="submitter" timestamp="Mon, 07 Jul 2008 08:46:03 +0000">
rbu
</metadata>
</glsa>