glsa-201610-04.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201610-04">
  <title>libgcrypt: Multiple vulnerabilities</title>
  <synopsis>Multiple vulnerabilities have been fixed in libgcrypt,the worst of
    which results in predictable output from the random number generator.
  </synopsis>
  <product type="ebuild">libgcrypt</product>
  <announced>2016-10-10</announced>
  <revised count="1">2016-10-10</revised>
  <bug>541564</bug>
  <bug>559942</bug>
  <bug>574268</bug>
  <bug>591534</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/libgcrypt" auto="yes" arch="*">
      <unaffected range="ge">1.7.3</unaffected>
      <vulnerable range="lt">1.7.3</vulnerable>
    </package>
  </affected>
  <background>
    <p>libgcrypt is a general purpose cryptographic library derived out of
      GnuPG.
    </p>
  </background>
  <description>
    <p>Multiple vulnerabilities have been discovered in libgcrypt. Please
      review the CVE identifiers referenced below for details.
    </p>
  </description>
  <impact type="normal">
    <p>Side-channel attacks can leak private key information. A separate
      critical bug allows an attacker who obtains 4640 bits from the RNG to
      trivially predict the next 160 bits of output.
    </p>
    
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All libgcrypt users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-libs/libgcrypt-1.7.3"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-3591">CVE-2014-3591</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0837">CVE-2015-0837</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-7511">CVE-2015-7511</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6313">CVE-2016-6313</uri>
    <uri link="https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/">
      Factoring RSA Keys With TLS Perfect Forward Secrecy
    </uri>
  </references>
  <metadata tag="requester" timestamp="2015-12-02T21:25:17Z">
    BlueKnight
  </metadata>
  <metadata tag="submitter" timestamp="2016-10-10T11:04:11Z">K_F</metadata>
</glsa>