-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Don Stikvoort Index : S-97-92 Distribution : World Page : 1 Classification: External Version: 1 Subject : Denial-of-service vulnerability in Solaris on Intel Pentium Date : 19-Dec-97 =============================================================================== By courtesy of Sun Microsystems we received information on a Denial-of-service vulnerability in Solaris on Intel Pentium die to the Intel Pentium processor invalid instruction erratum (already reported in S-97-88 for the case of FreeBSD). CERT-NL recommends to take the steps listed below. ============================================================================== ________________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00161 Date: December 18, 1997 Cross-Ref: Title: Intel Pentium processor invalid instruction erratum ________________________________________________________________________________ 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. Bulletins Topics Sun announces the release of patches for Solaris(tm) 2.6_x86, 2.5.1_x86, 2.5_x86, and 2.4_x86 which relate to the Pentium processor invalid instruction erratum. Sun strongly recommends that you install the patches listed in section 3 immediately if you are running Solaris 2.6_x86, 2.5.1_x86, 2.5_x86, and 2.4_x86 on systems affected by the Pentium processor invalid instruction erratum. 2. Understanding the Vulnerability Any user may execute an "Invalid Operand with Locked Compare Exchange 8Byte (CMPXCHG8B)" instruction and cause a Pentium processor to hang. The instruction can be part of any user program. This vulnerability, if exploited, allows unprivileged users to deny service to all users on the system by causing it to hang. Please visit the following web page for more information: http://www.intel.com/support/processors/pentium/ppiie/index.html 3. List of Patches The following patches are available in relation to the above problem. OS version Patch ID _________________ ________ Solaris 5.6_x86 105639-02 Solaris 5.5.1_x86 105638-02 Solaris 5.5_x86 105640-02 Solaris 5.4_x86 105653-02 _______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers via World Wide Web at: B. Checksums for the patches listed in this bulletin are available via World Wide Web at: C. Sun security bulletins are available via World Wide Web at: D. Sun Security Coordination Team's PGP key is available via World Wide Web at: E. 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 F. 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 Coordinaton 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 1997 Sun Microsystems, Inc. All rights reserved. Sun, Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks of Sun Microsystems, Inc. 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. ============================================================================== CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet is the Dutch network for educational, research and related institutes. CERT-NL is a member of the Forum of Incident Response and Security Teams (FIRST). All CERT-NL material is available under: http://www.surfnet.nl/surfnet/security/cert-nl.html ftp://ftp.surfnet.nl/surfnet/net-security In case of computer or network security problems please contact your local CERT/security-team or CERT-NL (if your institute is NOT a SURFnet customer please address the appropriate (local) CERT/security-team). CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer, i.e. UTC+0100 in winter and UTC+0200 in summer (DST). Email: cert-nl@surfnet.nl ATTENDED REGULARLY ALL DAYS Phone: +31 302 305 305 BUSINESS HOURS ONLY Fax: +31 302 305 329 BUSINESS HOURS ONLY Snailmail: SURFnet bv Attn. CERT-NL P.O. Box 19035 NL - 3501 DA UTRECHT The Netherlands NOODGEVALLEN: 06 52 87 92 82 ALTIJD BEREIKBAAR EMERGENCIES : +31 6 52 87 92 82 ATTENDED AT ALL TIMES CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES: THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED* PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU. ============================================================================== -----BEGIN PGP SIGNATURE----- Version: 2.6.2i iQCVAwUBNJp6z0U5nQkWIq1FAQHLEwP/S2iQVJlxbwdiFOIqI0PZqQgIvXYAxU+G WAxByKR0t1b9azOlnixWZ96AjhVpZ2zMfcm6Mee86pFa2S7TXeJnTb7WkMfWReoI jcW0d1qxnlGfhw+UDbe6zm/tz4e/YxMHxivtZ6DjlMru+eYn9Xh8lUTd5+lXm0m1 5TqKQCM8se4= =Sf4+ -----END PGP SIGNATURE-----