AUSCERT External Security Bulletin Redistribution
                   ESB-2000.342 -- CERT Advisory CA-2000-19
             Revocation of Sun Microsystems Browser Certificates
                              14 November 2000


	AusCERT Security Bulletin Summary

Product:                Browser Certificates
Vendor:                 Sun Microsystems
Impact:                 Provide Misleading Information
                        Execute Arbitrary Code/Commands
Access Required:        Remote

- --------------------------BEGIN INCLUDED TEXT--------------------


CERT Advisory CA-2000-19 Revocation of Sun Microsystems Browser Certificates

   Original release date: October 25, 2000 13:39:00 EDT
   Last revised: October 25, 2000 14:12:23 EDT
   Source: Sun Microsystems; CERT/CC
   A complete revision history is at the end of this file.
Systems Affected

   * Systems relying on the validity of the Sun Microsystems
     certificates mentioned below

   To aid in the wide distribution of essential security information,
   the CERT Coordination Center is forwarding the following
   information from Sun Microsystems. Sun urges you to act on this
   information as soon as possible. Contact information for the Sun
   security team can be found in their bulletin, which is referenced
   in the vendor appendix to this document.
I. Description

   The description below is an excerpt from Sun Security Bulletin 198.
   The original text can be found here.
                  Sun Microsystems, Inc. Security Bulletin
   Bulletin Number: #00198
   Date: October 24, 2000
   Title: Browser Certificates
   1. Bulletin Topics 
      Sun advises of a potential compromise of 2 specific security
      certificates which had limited distribution.  Sun recommends
      that you follow the directions found at
      http://sunsolve5.sun.com/secbull/certificate_howto.html to
      determine if your web browser has accepted any of the
      potentially compromised certificates.

   2. Who is Affected
      A web browser that has accepted a Sun certificate with one the
      following serial numbers:
         3181 B12D C422 5DAC A340 CF86 2710 ABE6 (Internet Explorer)
         17:05:FB:13:A2:2F:9A:F3:C1:30:F5:62:6E:12:50:4C (Netscape)
   3. Understanding the Vulnerability
      Web browsers accept security certificates from trusted
      sources. A specific certificate from Sun may have received
      outside exposure.  Systems that encounter this certificate are
      potentially vulnerable to attack from malicious applets,
      applications or components.
   4. Corrective Action

      Follow the instructions at
      http://sunsolve5.sun.com/secbull/certificate_howto.html to
      determine if your browser has accepted one of the potentially
      compromised certificates. If your browser contains this
      particular certificate, follow the instructions to remove it.
   Additional information from the CERT/CC

      Sun Microsystems has revoked the certificates with the following
      serial numbers:
         3181 B12D C422 5DAC A340 CF86 2710 ABE6

         1705 FB13 A22F 9AF3 C130 F562 6E12 504C

      You can confirm the revocation of these certificates at
II. Impact

      Users who accept these certificates into their browser may
      inadvertently run malicious code signed by the compromised
      certificates. Any such code would appear to be from Sun
      Microsystems, thus creating a misleading sense of trust.
III. Solution

   Remove the Compromised Certificates
      Sun Microsystems has provided identification information for the
      compromised certificates as well as instructions on how to
      remove them from common browsers. Users should follow Sun's
      instructions to remove these certificates from their browser and
      to prevent possible future addition.
Appendix A. Vendor Information

   Sun Microsystems
      Sun's official copy of their bulletin can be found at:
   The CERT Coordination Center thanks Sun Microsystems for bringing this
   issue to our attention.
   Author: The CERT/CC portions of this document were written by
           Jeffrey P. Lanza. Feedback on this advisory is appreciated.
   This document is available from:
CERT/CC Contact Information

   Email: cert@cert.org
          Phone: +1 412-268-7090 (24-hour hotline)
          Fax: +1 412-268-6989
          Postal address:
          CERT Coordination Center
          Software Engineering Institute
          Carnegie Mellon University
          Pittsburgh PA 15213-3890
   CERT personnel answer the hotline 08:00-20:00 EST(GMT-5) / EDT(GMT-4)
   Monday through Friday; they are on call for emergencies during other
   hours, on U.S. holidays, and on weekends.
Using encryption

   We strongly urge you to encrypt sensitive information sent by email.
   Our public PGP key is available from
   If you prefer to use DES, please call the CERT hotline for more
Getting security information

   CERT publications and other security information are available from
   our web site
   To be added to our mailing list for advisories and bulletins, send
   email to cert-advisory-request@cert.org and include SUBSCRIBE
   your-email-address in the subject of your message.
   * "CERT" and "CERT Coordination Center" are registered in the U.S.
   Patent and Trademark Office.
   Any material furnished by Carnegie Mellon University and the Software
   Engineering Institute is furnished on an "as is" basis. Carnegie
   Mellon University makes no warranties of any kind, either expressed or
   implied as to any matter including, but not limited to, warranty of
   fitness for a particular purpose or merchantability, exclusivity or
   results obtained from use of the material. Carnegie Mellon University
   does not make any warranty of any kind with respect to freedom from
   patent, trademark, or copyright infringement.
   Conditions for use, disclaimers, and sponsorship information
   Copyright 2000 Carnegie Mellon University.
   Revision History
October 25, 2000:  Initial release
October 25, 2000:  Updated author section and references to Sun Security Bulletin 198.

Version: PGP for Personal Privacy 5.0
Charset: noconv


- --------------------------END INCLUDED TEXT--------------------

This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content.  The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security

Internet Email: auscert@auscert.org.au
Facsimile:	(07) 3365 7031
Telephone:	(07) 3365 4417 (International: +61 7 3365 4417)
		AusCERT personnel answer during Queensland business hours
		which are GMT+10:00 (AEST).
		On call after hours for emergencies.

Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key