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[ GLSA 200411-38 ] Sun and Blackdown Java: Applet privilege escalation
From: Sune Kloppenborg Jeppesen <jaervosz () 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

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