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

<glsa id="200411-15">
  <title>OpenSSL, Groff: Insecure tempfile handling</title>
  <synopsis>
    groffer, included in the Groff package, and the der_chop script, included
    in the OpenSSL package, are both vulnerable to symlink attacks, potentially
    allowing a local user to overwrite arbitrary files with the rights of the
    user running the utility.
  </synopsis>
  <product type="ebuild">OpenSSL</product>
  <announced>November 08, 2004</announced>
  <revised>August 23, 2006: 02</revised>
  <bug>68404</bug>
  <bug>68407</bug>
  <access>local</access>
  <affected>
    <package name="dev-libs/openssl" auto="yes" arch="*">
      <unaffected range="ge">0.9.7d-r2</unaffected>
      <vulnerable range="lt">0.9.7d-r2</vulnerable>
    </package>
    <package name="sys-apps/groff" auto="yes" arch="*">
      <unaffected range="ge">1.19.1-r2</unaffected>
      <unaffected range="rge">1.18.1.1</unaffected>
      <vulnerable range="lt">1.19.1-r2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    OpenSSL is a toolkit implementing the Secure Sockets Layer and
    Transport Layer Security protocols as well as a general-purpose
    cryptography library. It includes the der_chop script, which is used to
    convert DER-encoded certificates to PEM format. Groff (GNU Troff) is a
    typesetting package which reads plain text mixed with formatting
    commands and produces formatted output. It includes groffer, a command
    used to display groff files and man pages on X and tty.
    </p>
  </background>
  <description>
    <p>
    groffer and the der_chop script create temporary files in
    world-writeable directories with predictable names.
    </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
    groffer or der_chop is executed, 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 Groff users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose sys-apps/groff</code>
    <p>
    All OpenSSL users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=dev-libs/openssl-0.9.7d-r2&quot;</code>
    <p>
    Note: /etc/ssl/misc/der_chop is protected by Portage as a configuration
    file. Don't forget to use etc-update and overwrite the old version with
    the new one.
    </p>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0969">CAN-2004-0969</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0975">CAN-2004-0975</uri>
  </references>
  <metadata tag="submitter" timestamp="Sun,  7 Nov 2004 18:43:48 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Sun,  7 Nov 2004 18:44:31 +0000">
    koon
  </metadata>
</glsa>