glsa-201603-13.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201603-13">
  <title>Libreswan: Multiple Vulnerabilities</title>
  <synopsis>Multiple vulnerabilities have been found in libreSwan possibly
    resulting in Denial of Service.
  </synopsis>
  <product type="ebuild"/>
  <announced>2016-03-12</announced>
  <revised>2016-03-12: 1</revised>
  <bug>550974</bug>
  <bug>558692</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/libreswan" auto="yes" arch="*">
      <unaffected range="ge">3.15</unaffected>
      <vulnerable range="lt">3.15</vulnerable>
    </package>
  </affected>
  <background>
    <p>Libreswan is a free software implementation of the most widely supported
      and standarized VPN protocol based on (“IPsec”) and the Internet Key
      Exchange (“IKE”).
    </p>
  </background>
  <description>
    <p>The pluto IKE daemon in Libreswan, when built with NSS, allows remote
      attackers to cause a Denial of Service (assertion failure and daemon
      restart) via a zero DH g^x value in a KE payload in a IKE packet. 
      Additionally, remote attackers could cause a Denial of Service (daemon
      restart) via an IKEv1 packet with (1) unassigned bits set in the IPSEC
      DOI value or (2) the next payload value set to ISAKMP_NEXT_SAK.
    </p>
  </description>
  <impact type="normal">
    <p>Remote attackers could possibly cause Denial of Service.</p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Libreswan users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=net-misc/libreswan-3.15"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3204">CVE-2015-3204</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3240">CVE-2015-3240</uri>
  </references>
  <metadata tag="requester" timestamp="2015-12-31T05:09:11Z">
    BlueKnight
  </metadata>
  <metadata tag="submitter" timestamp="2016-03-12T23:20:43Z">b-man</metadata>
</glsa>