glsa-202011-17.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202011-17">
  <title>MIT Kerberos 5: Denial of service</title>
  <synopsis>A vulnerability in MIT Kerberos 5 could lead to a Denial of Service
    condition.
  </synopsis>
  <product type="ebuild">mit-krb5</product>
  <announced>2020-11-16</announced>
  <revised count="1">2020-11-16</revised>
  <bug>753281</bug>
  <access>remote</access>
  <affected>
    <package name="app-crypt/mit-krb5" auto="yes" arch="*">
      <unaffected range="ge">1.18.2-r2</unaffected>
      <vulnerable range="lt">1.18.2-r2</vulnerable>
    </package>
  </affected>
  <background>
    <p>The MIT Kerberos 5 implementation provides a command line telnet client
      which is used for remote login via the telnet protocol.
    </p>
  </background>
  <description>
    <p>It was discovered that MIT Kerberos network authentication system, krb5,
      did not properly handle ASN.1-encoded Kerberos messages.
    </p>
  </description>
  <impact type="low">
    <p>A remote attacker could send a specially crafted Kerberos message,
      possibly resulting in a Denial of Service condition.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All MIT Kerberos 5 users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=app-crypt/mit-krb5-1.18.2-r2"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28196">CVE-2020-28196</uri>
  </references>
  <metadata tag="requester" timestamp="2020-11-13T18:08:33Z">sam_c</metadata>
  <metadata tag="submitter" timestamp="2020-11-16T02:42:29Z">sam_c</metadata>
</glsa>