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+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="201001-05">
+ <title>net-snmp: Authorization bypass</title>
+ <synopsis>
+ A remote attacker can bypass the tcp-wrappers client authorization in
+ net-snmp.
+ </synopsis>
+ <product type="ebuild">net-snmp</product>
+ <announced>2010-01-13</announced>
+ <revised count="01">2010-01-13</revised>
+ <bug>250429</bug>
+ <access>remote</access>
+ <affected>
+ <package name="net-analyzer/net-snmp" auto="yes" arch="*">
+ <unaffected range="ge">5.4.2.1-r1</unaffected>
+ <vulnerable range="lt">5.4.2.1-r1</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>
+ net-snmp bundles software for generating and retrieving SNMP data.
+ </p>
+ </background>
+ <description>
+ <p>
+ The netsnmp_udp_fmtaddr() function (snmplib/snmpUDPDomain.c), when
+ using TCP wrappers for client authorization, does not properly parse
+ hosts.allow rules.
+ </p>
+ </description>
+ <impact type="normal">
+ <p>
+ A remote, unauthenticated attacker could bypass the ACL filtering,
+ possibly resulting in the execution of arbitrary SNMP queries.
+ </p>
+ </impact>
+ <workaround>
+ <p>
+ If possible, protect net-snmp with custom iptables rules:
+ </p>
+ <code>
+ iptables -s [client] -d [host] -p udp --dport 161 -j ACCEPT
+ iptables -s 0.0.0.0/0 -d [host] -p udp --dport 161 -j DROP</code>
+ </workaround>
+ <resolution>
+ <p>
+ All net-snmp users should upgrade to the latest version:
+ </p>
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=net-analyzer/net-snmp-5.4.2.1-r1"</code>
+ </resolution>
+ <references>
+ <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-6123">CVE-2008-6123</uri>
+ </references>
+ <metadata tag="requester" timestamp="2009-09-28T18:16:15Z">
+ craig
+ </metadata>
+ <metadata tag="submitter" timestamp="2010-01-05T21:17:32Z">
+ craig
+ </metadata>
+ <metadata tag="bugReady" timestamp="2010-01-10T19:40:57Z">
+ craig
+ </metadata>
+</glsa>