[Full-Disclosure] [ GLSA 200411-38 ] Sun and Blackdown Java: Applet privilege escalation

From: Sune Kloppenborg Jeppesen (jaervosz_at_gentoo.org)
Date: 11/29/04

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    To: gentoo-announce@gentoo.org
Date: Mon, 29 Nov 2004 22:35:13 +0100

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    Gentoo Linux Security Advisory GLSA 200411-38
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: Sun and Blackdown Java: Applet privilege escalation
          Date: November 29, 2004
          Bugs: #72172, #72221
            ID: 200411-38

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    Synopsis
    ========

    The Java plug-in security in Sun and Blackdown Java environments can be
    bypassed to access arbitrary packages, allowing untrusted Java applets
    to perform unrestricted actions on the host system.

    Background
    ==========

    Sun and Blackdown both provide implementations of Java Development Kits
    (JDK) and Java Runtime Environments (JRE). All these implementations
    provide a Java plug-in that can be used to execute Java applets in a
    restricted environment for web browsers.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 dev-java/sun-jdk < 1.4.2.06 >= 1.4.2.06
      2 dev-java/sun-jre-bin < 1.4.2.06 >= 1.4.2.06
      3 dev-java/blackdown-jdk < 1.4.2.01 >= 1.4.2.01
      4 dev-java/blackdown-jre < 1.4.2.01 >= 1.4.2.01
        -------------------------------------------------------------------
         # Package 1 [dev-java/sun-jdk] only applies to x86 and AMD64
           users.
         # Package 2 [dev-java/sun-jre-bin] only applies to x86 and AMD64
           users.
         # Package 3 [dev-java/blackdown-jdk] only applies to x86 and
           AMD64 users.
         # Package 4 [dev-java/blackdown-jre] only applies to x86 and
           AMD64 users.
        -------------------------------------------------------------------
         4 affected packages; please see the notes above...
        -------------------------------------------------------------------

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

    All Java plug-ins are subject to a vulnerability allowing unrestricted
    Java package access.

    Impact
    ======

    A remote attacker could embed a malicious Java applet in a web page and
    entice a victim to view it. This applet can then bypass security
    restrictions and execute any command or access any file with the rights
    of the user running the web browser.

    Workaround
    ==========

    As a workaround you could disable Java applets on your web browser.

    Resolution
    ==========

    All Sun JDK users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=dev-java/sun-jdk-1.4.2.06"

    All Sun JRE users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=dev-java/sun-jre-bin-1.4.2.06"

    All Blackdown JDK users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=dev-java/blackdown-jdk-1.4.2.01"

    All Blackdown JRE users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=dev-java/blackdown-jre-1.4.2.01"

    Note: You should unmerge all vulnerable versions to be fully protected.

    References
    ==========

      [ 1 ] iDEFENSE Security Advisory 11.22.04
            http://www.idefense.com/application/poi/display?id=158&type=vulnerabilities
      [ 2 ] CAN-2004-1029
            http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1029
      [ 3 ] Blackdown Security Advisory 2004-01
            http://www.blackdown.org/java-linux/java2-status/security/Blackdown-SA-2004-01.txt

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

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

      http://security.gentoo.org/glsa/glsa-200411-38.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 2004 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

    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

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