<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202012-11">
  <title>c-ares: Denial of service</title>
  <synopsis>A Denial of Service vulnerability was discovered in c-ares.</synopsis>
  <product type="ebuild">c-ares</product>
  <announced>2020-12-23</announced>
  <revised count="1">2020-12-23</revised>
  <bug>754939</bug>
  <access>local, remote</access>
  <affected>
    <package name="net-dns/c-ares" auto="yes" arch="*">
      <unaffected range="ge">1.17.1</unaffected>
      <vulnerable range="lt">1.17.1</vulnerable>
    </package>
  </affected>
  <background>
    <p>c-ares is an asynchronous resolver library.</p>
  </background>
  <description>
    <p>It was discovered that c-ares incorrectly handled certain DNS requests.</p>
  </description>
  <impact type="low">
    <p>A remote attacker, able to trigger a DNS request for a host of their
      choice by an application linked against c-ares, 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 c-ares users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=net-dns/c-ares-1.17.1"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-8277">CVE-2020-8277</uri>
  </references>
  <metadata tag="requester" timestamp="2020-12-22T22:25:15Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2020-12-23T19:49:06Z">whissi</metadata>
</glsa>
