The latest security information on Intel® products.
Special Register Buffer Data Sampling Advisory
Intel ID: | INTEL-SA-00320 |
---|---|
Advisory Category: | Hardware |
Impact of vulnerability: | Information Disclosure |
Severity rating: | MEDIUM |
Original release: | 06/09/2020 |
Last revised: | 06/12/2020 |
Summary:
A potential security vulnerability in some Intel® Processors may allow information disclosure. Intel is releasing firmware updates to mitigate this potential vulnerability.
Vulnerability Details:
CVEID: CVE-2020-0543
Description: Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
CVSS Base Score: 6.5 Medium
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected Products:
A list of impacted products can be found here.
Recommendations:
Intel recommends that users of affected Intel® Processors update to the latest version firmware provided by the system manufacturer that addresses this issue.
Intel has released microcode updates for the affected Intel® Processors that are currently supported on the public github repository. Please see details below on access to the microcode:
GitHub*: Public Github: https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files
The microcode updates also provide an opt-out mechanism (RNGDS_MITG_DIS) to disable the mitigation for RDRAND and RDSEED instructions executed outside of Intel® Software Guard Extensions (Intel® SGX) enclaves. Please refer to technical details to find additional information on the opt-out mechanism here.
Note that inside of an Intel SGX enclave, the mitigation is applied regardless of the value of RNGDS_MITG_DIS.
Additional technical details about SRBDS can be found here.
To address this issue, an SGX TCB recovery will be required in Q3 2020. Refer to Intel® SGX Attestation Technical Details for more information on the SGX TCB recovery process.
Acknowledgements:
Intel would like to thank Alyssa Milburn, Hany Ragab, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida from the VUSec group at VU Amsterdam for reporting this issue.
This issue was also identified by Intel employees. Intel would like to thank Rodrigo Branco (formerly Intel), Kekai Hu (formerly Intel), Gabriel Negreira Barbosa (Intel), and Ke Sun (Intel).
Intel, and nearly the entire technology industry, follows a disclosure practice called Coordinated Disclosure, under which a cybersecurity vulnerability is generally publicly disclosed only after mitigations are available.
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 products and services described 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 products that have met their End of Servicing Updates may no longer receive functional and security updates. For additional details on support and servicing, please see this help article.
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 product or component can be absolutely secure. Check with your system manufacturer or retailer or learn more at http://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 Corporation. Intel, the Intel logo, and other Intel marks are trademarks of Intel Corporation or its subsidiaries United States and other countries. Other names and brands may be claimed as the property of others.
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 secure@intel.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.
Need product support?
If you...
- Have questions about the security features of an Intel product
- Require technical support
- Want product updates or patches
Please visit Support & Downloads.