[ GLSA 200501-28 ] Xpdf, GPdf: Stack overflow in Decrypt::makeFileKey2

From: Thierry Carrez (koon_at_gentoo.org)
Date: 01/21/05

  • Next message: Thierry Carrez: "[ GLSA 200501-30 ] CUPS: Stack overflow in included Xpdf code" 
    Date: Fri, 21 Jan 2005 21:39:54 +0100
To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200501-28
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: Xpdf, GPdf: Stack overflow in Decrypt::makeFileKey2
          Date: January 21, 2005
          Bugs: #77888, #78128
            ID: 200501-28

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    Synopsis
    ========

    A stack overflow was discovered in Xpdf, potentially resulting in the
    execution of arbitrary code. GPdf includes Xpdf code and therefore is
    vulnerable to the same issue.

    Background
    ==========

    Xpdf is an open source viewer for Portable Document Format (PDF) files.
    GPdf is a Gnome-based PDF viewer that includes some Xpdf code.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-text/xpdf <= 3.00-r7 >= 3.00-r8
      2 app-text/gpdf < 2.8.2 >= 2.8.2
        -------------------------------------------------------------------
         2 affected packages on all of their supported architectures.
        -------------------------------------------------------------------

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

    iDEFENSE reports that the Decrypt::makeFileKey2 function in Xpdf's
    Decrypt.cc insufficiently checks boundaries when processing /Encrypt
    /Length tags in PDF files.

    Impact
    ======

    An attacker could entice an user to open a specially-crafted PDF file
    which would trigger a stack overflow, potentially resulting in
    execution of arbitrary code with the rights of the user running Xpdf or
    GPdf.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Xpdf users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-text/xpdf-3.00-r8"

    All GPdf users should also upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-text/gpdf-2.8.2"

    References
    ==========

      [ 1 ] CAN-2005-0064
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064
      [ 2 ] iDEFENSE Advisory

    http://www.idefense.com/application/poi/display?id=186&type=vulnerabilities&flashstatus=true

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

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

      http://security.gentoo.org/glsa/glsa-200501-28.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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