<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200604-03"> <title>FreeRADIUS: Authentication bypass in EAP-MSCHAPv2 module</title> <synopsis> The EAP-MSCHAPv2 module of FreeRADIUS is affected by a validation issue which causes some authentication checks to be bypassed. </synopsis> <product type="ebuild">freeradius</product> <announced>2006-04-04</announced> <revised count="01">2006-04-04</revised> <bug>127229</bug> <access>remote</access> <affected> <package name="net-dialup/freeradius" auto="yes" arch="*"> <unaffected range="ge">1.1.1</unaffected> <unaffected range="lt">1.0.0</unaffected> <vulnerable range="lt">1.1.1</vulnerable> </package> </affected> <background> <p> FreeRADIUS is an open source RADIUS authentication server implementation. </p> </background> <description> <p> FreeRADIUS suffers from insufficient input validation in the EAP-MSCHAPv2 state machine. </p> </description> <impact type="normal"> <p> An attacker could cause the server to bypass authentication checks by manipulating the EAP-MSCHAPv2 client state machine. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All FreeRADIUS users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=net-dialup/freeradius-1.1.1"</code> </resolution> <references> <uri link="https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1354">CVE-2006-1354</uri> <uri link="https://www.freeradius.org/security.html">FreeRADIUS Vulnerability Notifications</uri> </references> <metadata tag="requester" timestamp="2006-04-01T10:41:34Z"> koon </metadata> <metadata tag="bugReady" timestamp="2006-04-01T10:42:20Z"> koon </metadata> <metadata tag="submitter" timestamp="2006-04-01T23:30:58Z"> vorlon078 </metadata> </glsa>