Q3 2018 Speculative Execution Side Channel Update
Security researchers have identified a speculative execution side-channel method called L1 Terminal Fault (L1TF). This method impacts select microprocessor products supporting Intel® Software Guard Extensions (Intel® SGX). Further investigation by Intel has identified two related applications of L1TF with the potential to impact additional microprocessors, operating systems, system management mode, and virtualization software. If used for malicious purposes, this class of vulnerability has the potential to improperly infer data values from multiple types of computing devices.
Intel is committed to product and customer security and to coordinated disclosure. We worked closely with other technology companies, operating system, and hypervisor software vendors, developing an industry-wide approach to mitigate these issues promptly and constructively.
For facts about these new exploits, technical resources, and steps you can take to help protect systems and information please visit: https://www.intel.com/securityfirst.
CVE-2018-3615 - L1 Terminal Fault: SGX
- Systems with microprocessors utilizing speculative execution and Intel® software guard extensions (Intel® SGX) may allow unauthorized disclosure of information residing in the L1 data cache from an enclave to an attacker with local user access via a side-channel analysis.
- 7.3 High CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CVE-2018-3620 - L1 Terminal Fault: OS/SMM
- Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access via a terminal page fault and a side-channel analysis.
- 6.5 Medium CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVE-2018-3646 - L1 Terminal Fault: VMM
- Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.
- 6.5 Medium CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
The following Intel-based platforms are potentially impacted by these issues. Intel may modify this list at a later time.
Intel® Core™ i3 processor (45nm and 32nm)
Intel® Core™ i5 processor (45nm and 32nm)
Intel® Core™ i7 processor (45nm and 32nm)
Intel® Core™ M processor family (45nm and 32nm)
2nd generation Intel® Core™ processors
3rd generation Intel® Core™ processors
4th generation Intel® Core™ processors
5th generation Intel® Core™ processors
6th generation Intel® Core™ processors **
7th generation Intel® Core™ processors **
8th generation Intel® Core™ processors **
Intel® Core™ X-series Processor Family for Intel® X99 platforms
Intel® Core™ X-series Processor Family for Intel® X299 platforms
Intel® Xeon® processor 3400 series
Intel® Xeon® processor 3600 series
Intel® Xeon® processor 5500 series
Intel® Xeon® processor 5600 series
Intel® Xeon® processor 6500 series
Intel® Xeon® processor 7500 series
Intel® Xeon® Processor E3 Family
Intel® Xeon® Processor E3 v2 Family
Intel® Xeon® Processor E3 v3 Family
Intel® Xeon® Processor E3 v4 Family
Intel® Xeon® Processor E3 v5 Family **
Intel® Xeon® Processor E3 v6 Family **
Intel® Xeon® Processor E5 Family
Intel® Xeon® Processor E5 v2 Family
Intel® Xeon® Processor E5 v3 Family
Intel® Xeon® Processor E5 v4 Family
Intel® Xeon® Processor E7 Family
Intel® Xeon® Processor E7 v2 Family
Intel® Xeon® Processor E7 v3 Family
Intel® Xeon® Processor E7 v4 Family
Intel® Xeon® Processor Scalable Family
Intel® Xeon® Processor D (1500, 2100)
** indicates Intel microprocessors affected by CVE-2018-3615 - L1 Terminal Fault: SGX
Please check with your system manufacturer for more information regarding updates for your system.
Intel has worked with operating system vendors, equipment manufacturers, and other ecosystem partners to develop platform firmware and software updates that can help protect systems from these methods.
This includes the release of updated Intel microprocessor microcode to our customers and partners. This microcode was previously released as part of INTEL-SA-00115.
Status of available microcode can be found here.
End users and systems administrators should check with their system manufacturers and system software vendors and apply any available updates as soon as practical.
Intel would like to thank Raoul Strackx1,Jo Van Bulck1, Marina Minkin2, Ofir Weisse3, Daniel Genkin3, Baris Kasikci3, Frank Piessens1, Mark Silberstein2, Thomas F. Wenisch3, and Yuval Yarom4 for reporting this issue and working with us on coordinated disclosure of CVE-2018-3615 (www.foreshadowattack.com)
1imec-DistriNet, KU Leuven, 2Technion, 3University of Michigan, 4University of Adelaide and Data61
Intel would like to thank employees Rodrigo Branco, Henrique Kawakami, Ke Sun, and Kekai Hu for discovery of CVE-2018-3615, CVE-2018-3620 and CVE-2018-3646.
Intel would like to acknowledge Lei Shi, Qihoo360 CERT for his independent work on CVE-2018-3620.
CVE Name: CVE-2018-3615, CVE-2018-3620, CVE-2018-3646
Legal Notices and Disclaimers
Intel provides these materials as-is, with no express or implied warranties.
All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.
Intel, processors, chipsets, and desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.
Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No computer system can be absolutely secure. Check with your system manufacturer or retailer or learn more at https://intel.com.
Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.
Intel and the Intel logo are trademarks of Intel Corporation in the United States and other countries.
*Other names and brands may be claimed as the property of others.
Copyright © Intel Corporation 2019
Report a Vulnerability
If you have information about a security issue or vulnerability with an Intel branded product or technology, please send an e-mail to email@example.com. Encrypt sensitive information using our PGP public key.
Please provide as much information as possible, including:
- The products and versions affected
- Detailed description of the vulnerability
- Information on known exploits
A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see:
For issues related to Intel's external web presence (Intel.com and related subdomains), please contact Intel's External Security Research team.