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CVE-2020-0549: INTEL-SA-00329

Cleanup errors in some data cache evictions for some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access.

4 years ago

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Intel® Processors Data Leakage Advisory

**Summary: **

Potential security vulnerabilities in some Intel® Processors may allow information disclosure. Intel is releasing firmware updates to mitigate these potential vulnerabilities.

Vulnerability Details:

CVEID: CVE-2020-0548

Description: Cleanup errors in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access.

CVSS Base Score: 2.8 Low

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

CVEID: CVE-2020-0549

Description: Cleanup errors in some data cache evictions for some Intel® 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 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

Additional technical details about these vulnerabilities can be found at:

https://software.intel.com/security-software-guidance/software-guidance/l1d-eviction-sampling

https://software.intel.com/security-software-guidance/software-guidance/vector-register-sampling

Additional Advisory Guidance on CVE-2020-0548, CVE 2020-0549 available here.

Acknowledgements:

Intel would like to thank the following individuals for finding, reporting and coordinating these vulnerabilities to us.

Intel thanks TU Graz and KU Leuven for disclosure of CVE-2020-0549.

Graz University of Technology: Moritz Lipp, Michael Schwarz, Daniel Gruss.

KU Leuven: Jo Van Bulck.

Intel thanks VU Amsterdam, for disclosure of CVE-2020-0548 and CVE-2020-0549. VUSec group at VU Amsterdam: Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida.

Researchers from TU Graz and Ku Leuven provided Intel with a Proof of Concept (POC) in May 2019 and researchers from VU Amsterdam provided Proof of Concept (POC) in October 2019. Intel subsequently confirmed each submission demonstrates CVE-2020-0549 individually.

Revision History

Revision

Date

Description

1.0

01/27/2020

Initial Release

1.1

06/09/2020

Updated Recomendations

1.2

05/11/2021

Added CVE Additional Guidance Link

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