glsa-200409-09.xml


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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>2004-09-06</announced>
  <revised count="01">2004-09-06</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 "&gt;=app-crypt/mit-krb5-1.3.4"
    # emerge "&gt;=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="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0642">CAN-2004-0642</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0643">CAN-2004-0643</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0644">CAN-2004-0644</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0772">CAN-2004-0772</uri>
  </references>
  <metadata tag="requester" timestamp="2004-09-03T20:07:22Z">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="2004-09-04T16:18:26Z">
    vorlon078
  </metadata>
</glsa>