glsa-201706-22.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201706-22">
  <title>libksba: Denial of Service and information disclosure</title>
  <synopsis>Multiple vulnerabilities have been found in libksba which might
    allow remote attackers to obtain sensitive information or crash an
    libksba-based application.
  </synopsis>
  <product type="ebuild">libksba</product>
  <announced>2017-06-22</announced>
  <revised>2017-06-22: 1</revised>
  <bug>592078</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/libksba" auto="yes" arch="*">
      <unaffected range="ge">1.3.5</unaffected>
      <vulnerable range="lt">1.3.5</vulnerable>
    </package>
  </affected>
  <background>
    <p>Libksba is a X.509 and CMS (PKCS#7) library.</p>
  </background>
  <description>
    <p>It was found that an unproportionate amount of memory is allocated when
      parsing crafted certificates in libskba, which may lead to Denial of
      Service condition.
    </p>
    
    <p>Moreover in libksba 1.3.4, allocated memory is uninitialized and could
      potentially contain sensitive data left in freed memory block.
    </p>
  </description>
  <impact type="normal">
    <p>A remote attacker, able to interact with an libksba-based application,
      could possibly obtain sensitive information or cause a Denial of Service
      condition.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All libksba users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-libs/libksba-1.3.5"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4579">CVE-2016-4579</uri>
    <uri link="http://seclists.org/oss-sec/2016/q3/343">Upstream report</uri>
  </references>
  <metadata tag="requester" timestamp="2017-04-19T05:51:10Z">BlueKnight</metadata>
  <metadata tag="submitter" timestamp="2017-06-22T17:42:08Z">whissi</metadata>
</glsa>