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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200405-23">
<title>Heimdal: Kerberos 4 buffer overflow in kadmin</title>
<synopsis>
A possible buffer overflow in the Kerberos 4 component of Heimdal has been
discovered.
</synopsis>
<product type="ebuild">Heimdal</product>
<announced>May 27, 2004</announced>
<revised>May 27, 2004: 01</revised>
<bug>50208</bug>
<access>remote </access>
<affected>
<package name="app-crypt/heimdal" auto="yes" arch="*">
<unaffected range="ge">0.6.2</unaffected>
<vulnerable range="lt">0.6.2</vulnerable>
</package>
</affected>
<background>
<p>
Heimdal is a free implementation of Kerberos.
</p>
</background>
<description>
<p>
A buffer overflow was discovered in kadmind, a server for administrative
access to the Kerberos database.
</p>
</description>
<impact type="high">
<p>
By sending a specially formatted message to kadmind, a remote attacker may
be able to crash kadmind causing a denial of service, or execute arbitrary
code with the permissions of the kadmind process.
</p>
</impact>
<workaround>
<p>
For a temporary workaround, providing you do not require Kerberos 4
support, you may turn off Kerberos 4 kadmin by running kadmind with the
--no-kerberos4 option.
</p>
</workaround>
<resolution>
<p>
All Heimdal users should upgrade to the latest stable version:
</p>
<code>
# emerge sync
# emerge -pv ">=app-crypt/heimdal-0.6.2"
# emerge ">=app-crypt/heimdal-0.6.2"</code>
</resolution>
<references>
<uri link="http://www.pdc.kth.se/heimdal/advisory/2004-05-06/">Heimdal 0.6.2 Release Notice</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0434">CAN-2004-0434</uri>
</references>
<metadata tag="submitter">
jaervosz
</metadata>
</glsa>
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