glsa-201612-39.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201612-39">
  <title>Bash: Arbitrary code execution</title>
  <synopsis>A vulnerability in Bash could potentially lead to arbitrary code
    execution.
  </synopsis>
  <product type="ebuild">bash</product>
  <announced>2016-12-13</announced>
  <revised count="2">2016-12-13</revised>
  <bug>594496</bug>
  <access>remote</access>
  <affected>
    <package name="app-shells/bash" auto="yes" arch="*">
      <unaffected range="ge">4.3_p46-r1</unaffected>
      <vulnerable range="lt">4.3_p46-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>Bash is the standard GNU Bourne Again SHell.</p>
  </background>
  <description>
    <p>A vulnerability was found in the way Bash expands $HOSTNAME. Injecting
      malicious code into $HOSTNAME could cause it to run each time Bash
      expands \h in the prompt string.
    </p>
  </description>
  <impact type="normal">
    <p>A remote attacker controlling the system’s hostname (i.e. via DHCP)
      could possibly execute arbitrary code with the privileges of the process,
      or cause a Denial of
      Service condition.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Bash users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=app-shells/bash-4.3_p46-r1"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-0634">CVE-2016-0634</uri>
  </references>
  <metadata tag="requester" timestamp="2016-09-23T02:45:43Z">
    BlueKnight
  </metadata>
  <metadata tag="submitter" timestamp="2016-12-13T07:00:09Z">whissi</metadata>
</glsa>