Sec. Vulnerability in JRE Bytecode Verifier

Sec. Vulnerability in JRE Bytecode Verifier

Post by Security Ale » Thu, 21 Mar 2002 07:36:37



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    HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0187,
    Originally issued:  18 March 2002
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The information in the following Security Bulletin should be acted
upon as soon as possible.  Hewlett-Packard Company will not be
liable for any consequences to any customer resulting from customer's
failure to fully implement instructions in this Security Bulletin as
soon as possible.

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ISSUE:  A vulnerability in the Java(TM) Runtime Environment Bytecode
        Verifier may be exploited by an untrusted applet to escalate
        privileges.

PLATFORM:  HP9000 Series 700/800 running HP-UX releases 10.20 and
           11.x only.  This security bulletin applies to Java
           on HP-UX.  It does not cover software shipped on Linux
           or Windows/NT.

POSSIBLE RESULT:  Privileges are escalated improperly.

MANUAL ACTIONS:  None

SOLUTION:  Install the latest Java releases, as described below.

AVAILABILITY: These fixed releases are on www.hp.com/go/java now.
              They are not available from itrc.hp.com
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A. Background

   A vulnerability in certain versions of the Java(TM) Runtime
   Environment may be exploited by an untrusted applet to escalate
   privileges.

   There are no known attacks reported based on this vulnerability
   to the best of Sun's knowledge.

B. Fixing the problem

     Obtain and install the latest releases of the Java products.
     For JDK/JRE 1.1.8, 1.2.2 and JDK/JRE 1.3.0 based releases go to
              www.hp.com/go/java.
     Section C. 1.) below will guide you in determining your
     installed Java version on HP-UX.  The vulnerability is
     fixed in releases 1.3.1 and higher.  Users of 1.3.0.x will
     need to update to 1.3.1.

     The releases described in HP Security Bulletin #0186, issued
     4 March 2002, also correct the vulnerability described here.
     In other words, the releases in Section C. below will correct
     both vulnerabilities.

C. Recommended solution

         JDK and JRE 1.1.8.06 or higher for HP-UX 10.20 or 11.x.
         JDK and JRE 1.2.2.12 or higher for HP-UX 11.x.
         JDK and JRE 1.3.1.00 or higher for HP-UX 11.x

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   HP-UX: Determining Java version information for JDK, JRE, and JPI
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There are two mechanisms to determine which versions of the Java
JDK/SDK (developer kit), JRE (runtime), or JPI (Java Plugin for
Netscape) you have installed.

First, you can use the following command to list the bundle revisions
for any installed Java products:

      /usr/sbin/swlist -l bundle | grep -i java

Second, you can ask Java to identify itself by executing the
following:

      <path>/bin/java -version
           where path is typically

      /opt/java - for Java 1.1
      /opt/java1.2 - for Java 1.2
      /opt/java1.3 - for Java 1.3

but may be an alternate location as specified during setup.

The plugin (JPI) is installed in user's home directories, so
you will need to check its version using the following.

For Java 1.2:

      $HOME/.netscape/java/bin/java -version

For Java 1.1, you must use:

      what $HOME/.netscape/java/bin/PA_RISC/green_threads/jre

   NOTE: Do not rely on Netscape's Help/About_Plug-ins menu to
         find the version number of the Plugin, because in some
         cases the version number is incorrect.

    a.) Unplugging the Plugin (Since the Plugin is manually
        installed into Netscape, it must be manually removed as
well.)

    If you have a plugin that you wish to remove because it has a
    security issue, in addition to doing a swremove of the product
    you must also do the following for Java 1.1 and Java 1.2:

    rm -f $HOME/.netscape/plugins/javaplugin.sl
    rm -rf $HOME/.netscape/java

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D. To subscribe to automatically receive future NEW HP Security
   Bulletins from the HP IT Resource Center via electronic
   mail, do the following:

   Use your browser to get to the HP IT Resource Center page
   at:

       http://itrc.hp.com

    Use the 'Login' tab at the left side of the screen to login
    using your ID and password.  Use your existing login or the
    "Register" button at the left to create a login, in order to
    gain access to many areas of the ITRC.  Remember to save the
    User ID assigned to you, and your password.

    In the left most frame select "Maintenance and Support".

    Under the "Notifications" section (near the bottom of
    the page), select "Support Information Digests".

    To -subscribe- to future HP Security Bulletins or other
    Technical Digests, click the check box (in the left column)
    for the appropriate digest and then click the "Update
    Subscriptions" button at the bottom of the page.

    or

    To -review- bulletins already released, select the link
    (in the middle column) for the appropriate digest.

    To -gain access- to the Security Patch Matrix, select
    the link for "The Security Bulletins Archive".  (near the
    bottom of the page)  Once in the archive the third link is
    to the current Security Patch Matrix. Updated daily, this
    matrix categorizes security patches by platform/OS release,
    and by bulletin topic.  Security Patch Check completely
    automates the process of reviewing the patch matrix for
    11.XX systems.

    For information on the Security Patch Check tool, see:
    http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
    displayProductInfo.pl?productNumber=B6834AA"

    The security patch matrix is also available via anonymous
    ftp:

    ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix

    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".

E. To report new security vulnerabilities, send email to


    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
    server, or by sending a message with a -subject- (not body)

    Permission is granted for copying and circulating this
    Bulletin to Hewlett-Packard (HP) customers (or the Internet
    community) for the purpose of alerting them to problems,
    if and only if, the Bulletin is not edited or changed in
    any way, is attributed to HP, and provided such reproduction
    and/or distribution is performed for non-commercial purposes.

    Any other use of this information is prohibited. HP is not
    liable for any misuse of this information by any third party.
 _________________________________________________________________

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