glsa-201703-05.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201703-05">
  <title>GNU Libtasn1: Denial of service</title>
  <synopsis>A vulnerability in Libtasn1 allows remote attackers to cause a
    Denial of Service condition.
  </synopsis>
  <product type="ebuild">libtasn1</product>
  <announced>2017-03-28</announced>
  <revised count="1">2017-03-28</revised>
  <bug>579748</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/libtasn1" auto="yes" arch="*">
      <unaffected range="ge">4.8</unaffected>
      <vulnerable range="lt">4.8</vulnerable>
    </package>
  </affected>
  <background>
    <p>A library that provides Abstract Syntax Notation One (ASN.1, as
      specified by the X.680 ITU-T recommendation) parsing and structures
      management, and Distinguished Encoding Rules (DER, as per X.690) encoding
      and decoding functions.
    </p>
  </background>
  <description>
    <p>Libtasn1 does not correctly handle certain malformed DER certificates.</p>
  </description>
  <impact type="normal">
    <p>A remote attacker could entice a user or automated system to process a
      specially crafted certificate using Libtasn1, resulting in a Denial of
      Service condition.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Libtasn1 users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-libs/libtasn1-4.8"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4008">CVE-2016-4008</uri>
  </references>
  <metadata tag="requester" timestamp="2017-02-22T11:00:00Z">b-man</metadata>
  <metadata tag="submitter" timestamp="2017-03-28T02:54:28Z">whissi</metadata>
</glsa>