<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201612-13">
  <title>nghttp2: Denial of service</title>
  <synopsis>Nghttp2 is vulnerable to a Denial of Service attack.</synopsis>
  <product type="ebuild">nghttp2</product>
  <announced>2016-12-05</announced>
  <revised count="1">2016-12-05</revised>
  <bug>574780</bug>
  <access>remote</access>
  <affected>
    <package name="net-libs/nghttp2" auto="yes" arch="*">
      <unaffected range="ge">1.7.1</unaffected>
      <vulnerable range="lt">1.7.1</vulnerable>
    </package>
  </affected>
  <background>
    <p>Nghttp2 is an implementation of HTTP/2 and its header compression
      algorithm HPACK in C.
    </p>
  </background>
  <description>
    <p>Nghttpd, nghttp, and libnghttp2_asio applications do not limit the
      memory usage for the incoming HTTP header field. If a peer sends a
      specially crafted HTTP/2 HEADERS frame and CONTINUATION frame, they will
      crash with an out of memory error.
    </p>
  </description>
  <impact type="normal">
    <p>A remote attacker could possibly cause a Denial of Service condition.</p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All nghttp2 users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=net-libs/nghttp2-1.7.1"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1544">CVE-2016-1544</uri>
  </references>
  <metadata tag="requester" timestamp="2016-11-22T13:39:02Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2016-12-05T01:23:37Z">whissi</metadata>
</glsa>
