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Category:   OS (Other)  >   Oracle Java SE Vendors:   Sun
Sun Java Runtime Environment (JRE) Bytecode Verifier Casting Bug Lets Arbitrary Code Execute Outside of the Java Security Sandbox
SecurityTracker Alert ID:  1003847
SecurityTracker URL:  http://securitytracker.com/id/1003847
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 19 2002
Impact:   Execution of arbitrary code via network


Description:   Sun reported a vulnerability in their Java Runtime Environment (JRE) bytecode verifier. An untrusted Java applet may be able to gain elevated privileges on the system.

The vulnerability reportedly exists in the processing to convert types via casting operations. A flaw reportedly exists in the security checks on casting operations. A remote user could exploit this flaw to execute code outside of the security sandbox. This code would execute in the security context of the target (victim) user. The flaw only affects Java applets, not Java applications.

No further technical details were provided.

The following JRE releases are reportedly affected:

Windows Production Releases

SDK and JRE 1.3.1_01a or earlier
SDK and JRE 1.3.0_05 or earlier
SDK and JRE 1.2.2_010 or earlier
JDK and JRE 1.1.8_008 or earlier

Solaris(TM) Operating Environment (OE) Reference Releases

SDK and JRE 1.2.2_010 or earlier
JDK and JRE 1.1.8_008 or earlier

Solaris OE Production Releases

SDK and JRE 1.3.1_01 or earlier
SDK and JRE 1.3.0_05 or earlier
SDK and JRE 1.2.2_10 or earlier
JDK and JRE 1.1.8_14 or earlier

Linux Production Releases

SDK and JRE 1.3.1_01 or earlier
SDK and JRE 1.3.0_05 or earlier
SDK and JRE 1.2.2_010 or earlier

Sun notes that releases prior to SDK and JRE 1.2.2, and JDK and JRE 1.1.8 for Windows and Solaris are also affected and should no longer be used. Users of these releases should upgrade to a later release.

This vulnerability reportedly does not affect the Java 2 SDK, Standard Edition, v 1.4.

Impact:   A remote user can create a Java applet that, when executed on another user's host, will cause arbitrary code to be executed on that other user's host. The arbitrary code can circumvent the Java sandbox security restrictions.
Solution:   The vendor has released a fix:

Windows Production Releases

SDK and JRE 1.4 http://java.sun.com/j2se/1.4/
SDK and JRE 1.3.1_02 http://java.sun.com/j2se/1.3/
SDK and JRE 1.2.2_011 http://java.sun.com/j2se/1.2/
JDK and JRE 1.1.8_009
http://java.sun.com/products/jdk/1.1/download-jdk-windows.html

Solaris OE Reference Releases

SDK and JRE 1.2.2_011 http://java.sun.com/j2se/1.2/
JDK and JRE 1.1.8_009
http://java.sun.com/products/jdk/1.1/download-jdk-solaris.html

Solaris OE Production Releases

SDK and JRE 1.4 http://java.sun.com/j2se/1.4/
SDK and JRE 1.3.1_02 http://java.sun.com/j2se/1.3/
SDK and JRE 1.2.2_11 http://java.sun.com/j2se/1.2/
JDK and JRE 1.1.8_15
http://java.sun.com/products/jdk/1.1/download-jdk-solaris.html

Linux Production Releases

SDK and JRE 1.4 http://java.sun.com/j2se/1.4/
SDK and JRE 1.3.1_02 http://java.sun.com/j2se/1.3/
SDK and JRE 1.2.2_011 http://java.sun.com/j2se/1.2/

Vendor URL:  sunsolve.sun.com/security (Links to External Site)
Cause:   Access control error
Underlying OS:  Java, Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
(HP Issues Fix) Sun Java Runtime Environment (JRE) Bytecode Verifier Casting Bug Lets Arbitrary Code Execute Outside of the Java Security Sandbox
The vendor has released a fix for HP/UX.
(Netscape Issues Fix for Netscape Browser) Re: Sun Java Runtime Environment (JRE) Bytecode Verifier Casting Bug Lets Arbitrary Code Execute Outside of the Java Security Sandbox
This is a follow-up message.
(IBM Issues Fix for Websphere) Re: Sun Java Runtime Environment (JRE) Bytecode Verifier Casting Bug Lets Arbitrary Code Execute Outside of the Java Security Sandbox
IBM has issued a fix for the JRE component of the Applet Client environment for WebSphere.
(SGI Plans to Issue a Fix) Re: Sun Java Runtime Environment (JRE) Bytecode Verifier Casting Bug Lets Arbitrary Code Execute Outside of the Java Security Sandbox
SGI plans to issue a fix.



 Source Message Contents

Subject:  Sun Security Bulletin #00218


-----BEGIN PGP SIGNED MESSAGE-----

________________________________________________________________________________
                    Sun Microsystems, Inc. Security Bulletin
                 
Bulletin Number:        #00218
Date:                   March 18, 2002
Cross-Ref:                
Title:                  Bytecode Verifier
________________________________________________________________________________

The information contained in this Security Bulletin is provided "AS IS." 
Sun makes no warranties of any kind whatsoever with respect to the information 
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS, 
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR 
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.

IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE, 
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL 
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY 
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN 
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF 
THE POSSIBILITY OF SUCH DAMAGES.

If any of the above provisions are held to be in violation of applicable law, 
void, or unenforceable in any jurisdiction, then such provisions are waived 
to the extent necessary for this disclaimer to be otherwise enforceable in 
such jurisdiction.
________________________________________________________________________________

1. Background

   A vulnerability in the Java(TM) Runtime Environment Bytecode Verifier
   may be exploited by an untrusted applet to escalate privileges.
   
   The full and custom installations of Netscape 6.2.1 and earlier 
   are affected since they include an affected version of the 
   Java Runtime Environment. The default Java runtime environments of 
   Netscape(TM) Communicator version 4.79 and earlier are affected. 
   For more information, see 
   
           http://home.netscape.com/security
   
   Microsoft VM up to and including build 3802 is affected.
   For more information, see 
   
           http://www.microsoft.com/technet/security/bulletin/MS02-013.asp
     
   This issue may or may not affect other vendors' Java technology
   implementations which are derived from Sun's SDK and JDK(TM) source bases. 
   Sun has notified and made the remedy available to its Java 
   technology licensees.

   Sun recommends that users of affected releases upgrade to the latest 
   SDK, JDK, and JRE releases listed in section 3 of this bulletin.

2. Affected Releases
   
   The following releases are affected:
     
   Windows Production Releases
   
     SDK and JRE 1.3.1_01a or earlier
     SDK and JRE 1.3.0_05 or earlier
     SDK and JRE 1.2.2_010 or earlier
     JDK and JRE 1.1.8_008 or earlier
     
   Solaris(TM) Operating Environment (OE) Reference Releases
   
     SDK and JRE 1.2.2_010 or earlier
     JDK and JRE 1.1.8_008 or earlier
     
   Solaris OE Production Releases
   
     SDK and JRE 1.3.1_01 or earlier
     SDK and JRE 1.3.0_05 or earlier
     SDK and JRE 1.2.2_10 or earlier
     JDK and JRE 1.1.8_14 or earlier

   Linux Production Releases

     SDK and JRE 1.3.1_01 or earlier
     SDK and JRE 1.3.0_05 or earlier
     SDK and JRE 1.2.2_010 or earlier
     
   Releases prior to SDK and JRE 1.2.2, and JDK and JRE 1.1.8 for 
   Windows and Solaris are also affected and should no longer be used. 
   Users of these releases should upgrade to a later release listed in 
   Section 3.
   
   This vulnerability does not affect the Java 2 SDK, Standard Edition, v 1.4.  
     
3. Latest Releases

   Windows Production Releases
   
     SDK and JRE 1.4                http://java.sun.com/j2se/1.4/
     SDK and JRE 1.3.1_02        http://java.sun.com/j2se/1.3/
     SDK and JRE 1.2.2_011        http://java.sun.com/j2se/1.2/
     JDK and JRE 1.1.8_009
       http://java.sun.com/products/jdk/1.1/download-jdk-windows.html
       
   Solaris OE Reference Releases
   
     SDK and JRE 1.2.2_011        http://java.sun.com/j2se/1.2/
     JDK and JRE 1.1.8_009   
       http://java.sun.com/products/jdk/1.1/download-jdk-solaris.html

   Solaris OE Production Releases
   
     SDK and JRE 1.4                http://java.sun.com/j2se/1.4/
     SDK and JRE 1.3.1_02        http://java.sun.com/j2se/1.3/
     SDK and JRE 1.2.2_11        http://java.sun.com/j2se/1.2/ 
     JDK and JRE 1.1.8_15
       http://java.sun.com/products/jdk/1.1/download-jdk-solaris.html
       
   Linux Production Releases
   
     SDK and JRE 1.4                http://java.sun.com/j2se/1.4/
     SDK and JRE 1.3.1_02        http://java.sun.com/j2se/1.3/
     SDK and JRE 1.2.2_011        http://java.sun.com/j2se/1.2/
_______________________________________________________________________________
Sun acknowledges, with thanks, Trusted Logic S.A. for bringing this issue 
to our attention. 
_______________________________________________________________________________
APPENDICES

A.  Sun security bulletins are available at:

    http://sunsolve.sun.com/security
        
B.  Sun Security Coordination Team's PGP key is available at:

    http://sunsolve.sun.com/pgpkey.txt
                                            
C.  To report or inquire about a security problem with Sun software, contact 
    one or more of the following:
  
        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT 
        - Sun Security Coordination Team. Send email to:
         
                     security-alert@sun.com

D.  To receive information or subscribe to our CWS (Customer Warning System) 
    mailing list, send email to:
    
                     security-alert@sun.com
   
    with a subject line (not body) containing one of the following commands:

        Command         Information Returned/Action Taken
        _______         _________________________________

        help            An explanation of how to get information
        
        key             Sun Security Coordination Team's PGP key
        
        list            A list of current security topics

        query [topic]   The email is treated as an inquiry and is forwarded to 
                        the Security Coordination Team

        report [topic]  The email is treated as a security report and is
                        forwarded to the Security Coordination Team. Please 
                        encrypt sensitive mail using Sun Security Coordination
                        Team's PGP key

        send topic      A short status summary or bulletin. For example, to 
                        retrieve a Security Bulletin #00138, supply the 
                        following in the subject line (not body):
                        
                                send #138

        subscribe       Sender is added to our mailing list.  To subscribe, 
                        supply the following in the subject line (not body):

                                subscribe cws your-email-address
                        
                        Note that your-email-address should be substituted
                        by your email address.
                        
        unsubscribe     Sender is removed from the CWS mailing list.
________________________________________________________________________________

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Sun, 
Sun Microsystems, the Sun logo, Solaris, Java, and JDK are trademarks or 
registered trademarks of Sun Microsystems, Inc. in the United States and 
other countries. Netscape is a trademark or registered trademark of
Netscape Communications Corporation in the United States and other countries.
This Security Bulletin may be reproduced and distributed, provided that this 
Security Bulletin is not modified in any way and is attributed to 
Sun Microsystems, Inc. and provided that such reproduction and distribution 
is performed for non-commercial purposes.

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