<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200404-09"> <title>Cross-realm trust vulnerability in Heimdal</title> <synopsis> Heimdal contains cross-realm vulnerability allowing someone with control over a realm to impersonate anyone in the cross-realm trust path. </synopsis> <product type="ebuild">heimdal</product> <announced>2004-04-09</announced> <revised count="01">2004-04-09</revised> <bug>46590</bug> <access>local</access> <affected> <package name="app-crypt/heimdal" auto="yes" arch="*"> <unaffected range="ge">0.6.1</unaffected> <vulnerable range="le">0.6.0</vulnerable> </package> </affected> <background> <p> Heimdal is a free implementation of Kerberos 5. </p> </background> <description> <p> Heimdal does not properly perform certain consistency checks for cross-realm requests, which allows remote attackers with control of a realm to impersonate others in the cross-realm trust path. </p> </description> <impact type="normal"> <p> Remote attackers with control of a realm may be able to impersonate other users in the cross-realm trust path. </p> </impact> <workaround> <p> A workaround is not currently known for this issue. All users are advised to upgrade to the latest version of the affected package. </p> </workaround> <resolution> <p> Heimdal users should upgrade to version 0.6.1 or later: </p> <code> # emerge sync # emerge -pv ">=app-crypt/heimdal-0.6.1" # emerge ">=app-crypt/heimdal-0.6.1"</code> </resolution> <references> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0371">CVE</uri> </references> <metadata tag="submitter">klieber</metadata> </glsa>