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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200409-09">
<title>MIT krb5: Multiple vulnerabilities</title>
<synopsis>
MIT krb5 contains several double-free vulnerabilities, potentially allowing
the execution of arbitrary code, as well as a denial of service
vulnerability.
</synopsis>
<product type="ebuild">mit-krb5</product>
<announced>September 06, 2004</announced>
<revised>September 06, 2004: 01</revised>
<bug>62417</bug>
<access>remote</access>
<affected>
<package name="app-crypt/mit-krb5" auto="yes" arch="*">
<unaffected range="ge">1.3.4</unaffected>
<vulnerable range="lt">1.3.4</vulnerable>
</package>
</affected>
<background>
<p>
MIT krb5 is the free implementation of the Kerberos network authentication
protocol by the Massachusetts Institute of Technology.
</p>
</background>
<description>
<p>
The implementation of the Key Distribution Center (KDC) and the MIT krb5
library contain double-free vulnerabilities, making client programs as well
as application servers vulnerable.
</p>
<p>
The ASN.1 decoder library is vulnerable to a denial of service attack,
including the KDC.
</p>
</description>
<impact type="high">
<p>
The double-free vulnerabilities could allow an attacker to execute
arbitrary code on a KDC host and hosts running krb524d or vulnerable
services. In the case of a KDC host, this can lead to a compromise of the
entire Kerberos realm. Furthermore, an attacker impersonating a legitimate
KDC or application server can potentially execute arbitrary code on
authenticating clients.
</p>
<p>
An attacker can cause a denial of service for a KDC or application server
and clients, the latter if impersonating a legitimate KDC or application
server.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All mit-krb5 users should upgrade to the latest stable version:
</p>
<code>
# emerge sync
# emerge -pv ">=app-crypt/mit-krb5-1.3.4"
# emerge ">=app-crypt/mit-krb5-1.3.4"</code>
</resolution>
<references>
<uri link="http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-002-dblfree.txt">MIT krb5 Security Advisory 2004-002</uri>
<uri link="http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-003-asn1.txt">MIT krb5 Security Advisory 2004-003</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0642">CAN-2004-0642</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0643">CAN-2004-0643</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0644">CAN-2004-0644</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0772">CAN-2004-0772</uri>
</references>
<metadata tag="requester" timestamp="Fri, 3 Sep 2004 20:07:22 +0000">
jaervosz
</metadata>
<metadata tag="submitter" timestamp="Sat, 4 Sep 2004 16:18:26 +0000">
vorlon078
</metadata>
</glsa>