gentoo-overlay/metadata/glsa/glsa-200701-01.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200701-01">
  <title>DenyHosts: Denial of service</title>
  <synopsis>
    DenyHosts does not correctly parse log entries, potentially causing a
    remote Denial of Service.
  </synopsis>
  <product type="ebuild">denyhosts</product>
  <announced>2007-01-03</announced>
  <revised count="01">2007-01-03</revised>
  <bug>157163</bug>
  <access>remote</access>
  <affected>
    <package name="app-admin/denyhosts" auto="yes" arch="*">
      <unaffected range="ge">2.6</unaffected>
      <vulnerable range="lt">2.6</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    DenyHosts is designed to monitor SSH servers for repeated failed login
    attempts.
    </p>
  </background>
  <description>
    <p>
    Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that
    DenyHosts used an incomplete regular expression to parse failed login
    attempts.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote unauthenticated attacker can add arbitrary hosts to the
    blacklist by attempting to login with a specially crafted username. An
    attacker may use this to prevent legitimate users from accessing a host
    remotely.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All DenyHosts users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=app-admin/denyhosts-2.6"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6301">CVE-2006-6301</uri>
  </references>
  <metadata tag="submitter" timestamp="2006-12-18T22:34:37Z">
    taviso
  </metadata>
  <metadata tag="bugReady" timestamp="2007-01-01T14:18:29Z">
    taviso
  </metadata>
</glsa>