glsa-201210-05.xml


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<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201210-05">
  <title>Bash: Multiple vulnerabilities</title>
  <synopsis>Two vulnerabilities have been found in Bash, the worst of which may
    allow execution of arbitrary code.
  </synopsis>
  <product type="ebuild">bash</product>
  <announced>October 20, 2012</announced>
  <revised>October 20, 2012: 1</revised>
  <bug>251319</bug>
  <bug>431850</bug>
  <access>local</access>
  <affected>
    <package name="app-shells/bash" auto="yes" arch="*">
      <unaffected range="ge">4.2_p37</unaffected>
      <vulnerable range="lt">4.2_p37</vulnerable>
    </package>
  </affected>
  <background>
    <p>Bash is the standard GNU Bourne Again SHell. </p>
  </background>
  <description>
    <p>Two vulnerabilities have been found in Bash:</p>
    
    <ul>
      <li>Bash example scripts do not handle temporary files securely
        (CVE-2008-5374).
      </li>
      <li>Improper bounds checking in Bash could cause a stack-based buffer
        overflow (CVE-2012-3410).
      </li>
    </ul>
  </description>
  <impact type="normal">
    <p>A remote attacker could entice a user to open a specially crafted Bash
      script, possibly resulting in execution of arbitrary code with the
      privileges of the process, or a Denial of Service condition of the Bash
      executable. 
    </p>
    
    <p>A local attacker may be able to perform symlink attacks to overwrite
      arbitrary files with the privileges of the user running the application
      or bypass shell access restrictions.
    </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-4.2_p37"
    </code>
  </resolution>
  <references>
    <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-5374">CVE-2008-5374</uri>
    <uri link="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3410">CVE-2012-3410</uri>
  </references>
  <metadata tag="requester" timestamp="Tue, 04 Sep 2012 16:02:06 +0000">
    underling
  </metadata>
  <metadata tag="submitter" timestamp="Sat, 20 Oct 2012 00:12:47 +0000">ackle</metadata>
</glsa>