[ GLSA 200501-31 ] teTeX, pTeX, CSTeX: Multiple vulnerabilities

From: Thierry Carrez (koon_at_gentoo.org)
Date: 01/23/05

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To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200501-31
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: teTeX, pTeX, CSTeX: Multiple vulnerabilities
          Date: January 23, 2005
          Bugs: #75801
            ID: 200501-31

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    Synopsis
    ========

    teTeX, pTeX and CSTeX make use of vulnerable Xpdf code which may allow
    the remote execution of arbitrary code. Furthermore, the xdvizilla
    script is vulnerable to temporary file handling issues.

    Background
    ==========

    teTeX is a complete and open source TeX distribution. CSTeX is another
    TeX distribution including Czech and Slovak support. pTeX is another
    alternative that allows Japanese publishing with TeX. xdvizilla is an
    auxiliary script used to integrate DVI file viewing in Mozilla-based
    browsers.

    Affected packages
    =================

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-text/tetex < 2.0.2-r5 >= 2.0.2-r5
      2 app-text/cstetex < 2.0.2-r1 >= 2.0.2-r1
      3 app-text/ptex < 3.1.4-r2 >= 3.1.4-r2
        -------------------------------------------------------------------
         3 affected packages on all of their supported architectures.
        -------------------------------------------------------------------

    Description
    ===========

    teTeX, pTeX and CSTeX all make use of Xpdf code and may therefore be
    vulnerable to the various overflows that were discovered in Xpdf code
    (CAN-2004-0888, CAN-2004-0889, CAN-2004-1125 and CAN-2005-0064).
    Furthermore, Javier Fernandez-Sanguino Pena discovered that the
    xdvizilla script does not handle temporary files correctly.

    Impact
    ======

    An attacker could design a malicious input file which, when processed
    using one of the TeX distributions, could lead to the execution of
    arbitrary code. Furthermore, a local attacker could create symbolic
    links in the temporary files directory, pointing to a valid file
    somewhere on the filesystem. When xdvizilla is called, this would
    result in the file being overwritten with the rights of the user
    running the script.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All teTeX users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-text/tetex-2.0.2-r5"

    All CSTeX users should also upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-text/cstetex-2.0.2-r1"

    Finally, all pTeX users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-text/ptex-3.1.4-r2"

    References
    ==========

      [ 1 ] CAN-2004-0888
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0888
      [ 2 ] CAN-2004-0889
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0889
      [ 3 ] CAN-2004-1125
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1125
      [ 4 ] CAN-2005-0064
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064

    Availability
    ============

    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:

      http://security.gentoo.org/glsa/glsa-200501-31.xml

    Concerns?
    =========

    Security is a primary focus of Gentoo Linux and ensuring the
    confidentiality and security of our users machines is of utmost
    importance to us. Any security concerns should be addressed to
    security@gentoo.org or alternatively, you may file a bug at
    http://bugs.gentoo.org.

    License
    =======

    Copyright 2005 Gentoo Foundation, Inc; referenced text
    belongs to its owner(s).

    The contents of this document are licensed under the
    Creative Commons - Attribution / Share Alike license.

    http://creativecommons.org/licenses/by-sa/2.0

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