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<?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>April 09, 2004</announced>
<revised>April 09, 2004: 01</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="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0371">CVE</uri>
</references>
<metadata tag="submitter">klieber</metadata>
</glsa>