glsa-201203-05.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201203-05">
  <title>Rack: Denial of service</title>
  <synopsis>A hash collision vulnerability in Rack allows remote attackers to
    cause a Denial of Service condition.
  </synopsis>
  <product type="ebuild">rack</product>
  <announced>2012-03-06</announced>
  <revised count="1">2012-03-06</revised>
  <bug>396455</bug>
  <access>remote</access>
  <affected>
    <package name="dev-ruby/rack" auto="yes" arch="*">
      <unaffected range="ge">1.1.3</unaffected>
      <vulnerable range="lt">1.1.3</vulnerable>
    </package>
  </affected>
  <background>
    <p>Rack is a modular Ruby web server interface.</p>
  </background>
  <description>
    <p>Rack does not properly randomize hash functions to protect against hash
      collision attacks.
    </p>
  </description>
  <impact type="normal">
    <p>A remote attacker could send a specially crafted form post, 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 Rack users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-ruby/rack-1.1.3"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-5036">CVE-2011-5036</uri>
  </references>
  <metadata timestamp="2012-03-04T21:22:25Z" tag="requester">ackle</metadata>
  <metadata timestamp="2012-03-06T01:05:34Z" tag="submitter">ackle</metadata>
</glsa>