The latest security information on Intel® products.
2024.1 IPU - Intel® Processor Return Predictions Advisory
| Intel ID: | INTEL-SA-00982 |
|---|---|
| Advisory Category: | Hardware |
| Impact of vulnerability: | Information Disclosure |
| Severity rating: | MEDIUM |
| Original release: | 03/12/2024 |
| Last revised: | 03/12/2024 |
Summary:
A potential security vulnerability in some Intel® Processors may allow information disclosure. Intel is releasing a firmware update to mitigate this potential vulnerability.
Vulnerability Details:
CVEID: CVE-2023-38575
Description: Non-transparent sharing of return predictor targets between contexts in some Intel® Processors may allow an authorized user to potentially enable information disclosure via local access.
CVSS Base Score: 5.5 Medium
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Products:
A list of impacted products can be found here.
Recommendation:
Intel recommends that users of affected Intel® Processors update to the latest version firmware provided by the system manufacturer that addresses these issues.
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
For non Intel® Software Guard Extension (SGX) customers the microcode patch can be OS loadable.
For the mitigation to be effective for Intel® SGX enabled systems, Intel recommends updating the microcode located in platform flash designated by firmware interface table (FIT) entry point1.
Detailed steps on the microcode loading points can be found at:
https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/secure-coding/loading-microcode-os.html
End users and systems administrators should check with their system manufacturers and system software vendors and apply any available updates as soon as practical.
To address this vulnerability, a SGX TCB recovery is planned, refer here for more information on the SGX TCB recovery process.
Attestation responses will change as a result of the TCB Recovery. Refer to the Intel SGX Attestation Technical Details documentation for further details.
Acknowledgements:
Intel would like to thank Intel employees for reporting this issue.
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.
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