glsa-200407-07.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">

<glsa id="200407-07">
  <title>Shorewall : Insecure temp file handling</title>
  <synopsis>
    Shorewall contains a bug in the code handling the creation of temporary
    files and directories. This can allow a non-root user to overwrite
    arbitrary system files.
  </synopsis>
  <product type="ebuild">Shorewall</product>
  <announced>July 08, 2004</announced>
  <revised>May 22, 2006: 02</revised>
  <bug>55675</bug>
  <access>local</access>
  <affected>
    <package name="net-firewall/shorewall" auto="yes" arch="*">
      <unaffected range="ge">1.4.10f</unaffected>
      <vulnerable range="le">1.4.10c</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Shorewall is a high level tool for configuring Netfilter, the firewall
    facility included in the Linux Kernel.
    </p>
  </background>
  <description>
    <p>
    Shorewall uses temporary files and directories in an insecure manner. A
    local user could create symbolic links at specific locations,
    eventually overwriting other files on the filesystem with the rights of
    the shorewall process.
    </p>
  </description>
  <impact type="normal">
    <p>
    An attacker could exploit this vulnerability to overwrite arbitrary
    system files with root privileges, resulting in Denial of Service or
    further exploitation.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time. All users should upgrade to
    the latest available version of Shorewall.
    </p>
  </workaround>
  <resolution>
    <p>
    All users should upgrade to the latest available version of Shorewall,
    as follows:
    </p>
    <code>
    # emerge sync
    
    # emerge -pv &quot;&gt;=net-firewall/shorewall-1.4.10f&quot;
    # emerge &quot;&gt;=net-firewall/shorewall-1.4.10f&quot;</code>
  </resolution>
  <references>
    <uri link="http://lists.shorewall.net/pipermail/shorewall-announce/2004-June/000385.html">Shorewall Announcement</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0647">CVE-2004-0647</uri>
  </references>
  <metadata tag="submitter">
    jaervosz
  </metadata>
</glsa>