glsa-200504-25.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200504-25">
  <title>Rootkit Hunter: Insecure temporary file creation</title>
  <synopsis>
    Rootkit Hunter is vulnerable to symlink attacks, potentially allowing a
    local user to overwrite arbitrary files.
  </synopsis>
  <product type="ebuild">rkhunter</product>
  <announced>2005-04-26</announced>
  <revised>2005-04-26: 01</revised>
  <bug>90007</bug>
  <access>local</access>
  <affected>
    <package name="app-forensics/rkhunter" auto="yes" arch="*">
      <unaffected range="ge">1.2.3-r1</unaffected>
      <vulnerable range="lt">1.2.3-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Rootkit Hunter is a scanning tool to detect rootkits, backdoors
    and local exploits on a local machine. Rootkit Hunter uses downloaded
    data files to check file integrity. These files are updated via the
    check_update.sh script.
    </p>
  </background>
  <description>
    <p>
    Sune Kloppenborg Jeppesen and Tavis Ormandy of the Gentoo Linux
    Security Team have reported that the check_update.sh script and the
    main rkhunter script insecurely creates several temporary files with
    predictable filenames.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could create symbolic links in the temporary
    files directory, pointing to a valid file somewhere on the filesystem.
    When rkhunter or the check_update.sh script runs, this would result in
    the file being overwritten with the rights of the user running the
    utility, which could be the root user.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Rootkit Hunter users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=app-forensics/rkhunter-1.2.3-r1"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1270">CAN-2005-1270</uri>
  </references>
  <metadata tag="submitter" timestamp="2005-04-26T06:10:01Z">
    jaervosz
  </metadata>
  <metadata tag="bugReady" timestamp="2005-04-26T18:37:38Z">
    koon
  </metadata>
</glsa>