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<?xml version="1.0" encoding="utf-8"?>
<glsa id="201001-05">
<title>net-snmp: Authorization bypass</title>
A remote attacker can bypass the tcp-wrappers client authorization in
<product type="ebuild">net-snmp</product>
<announced>January 13, 2010</announced>
<revised>January 13, 2010: 01</revised>
<package name="net-analyzer/net-snmp" auto="yes" arch="*">
<unaffected range="ge"></unaffected>
<vulnerable range="lt"></vulnerable>
net-snmp bundles software for generating and retrieving SNMP data.
The netsnmp_udp_fmtaddr() function (snmplib/snmpUDPDomain.c), when
using TCP wrappers for client authorization, does not properly parse
hosts.allow rules.
<impact type="normal">
A remote, unauthenticated attacker could bypass the ACL filtering,
possibly resulting in the execution of arbitrary SNMP queries.
If possible, protect net-snmp with custom iptables rules:
iptables -s [client] -d [host] -p udp --dport 161 -j ACCEPT
iptables -s -d [host] -p udp --dport 161 -j DROP</code>
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-2008-6123</uri>
<metadata tag="requester" timestamp="Mon, 28 Sep 2009 18:16:15 +0000">
<metadata tag="submitter" timestamp="Tue, 05 Jan 2010 21:17:32 +0000">
<metadata tag="bugReady" timestamp="Sun, 10 Jan 2010 19:40:57 +0000">