Cross-Process Information Leak
Bulletin ID: AMD-SB-7008
Potential Impact: Information disclosure
Severity: Medium
Summary
Under specific microarchitectural circumstances, a register in “Zen 2” CPUs may not be written to 0 correctly. This may cause data from another process and/or thread to be stored in the YMM register, which may allow an attacker to potentially access sensitive information.
CVE Details
Refer to Glossary for explanation of terms
| CVE | Severity |
CVE Description |
CVE-2023-20593 |
Medium |
An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information. |
Mitigation
AMD recommends applying the µcode patch listed below for AMD EPYC™ 7002 Processors, and applying BIOS updates that include the following AGESA™ firmware versions for other affected products. AMD plans to release to the Original Equipment Manufacturers (OEM) the AGESA™ versions on the target dates listed below. Please refer to your OEM for the BIOS update specific to your product.
DATA CENTER
| Mitigation details Update to versions listed or higher |
2nd Gen AMD EPYC™ Processors (Formerly codenamed) “Rome” |
µcode |
0x0830107B (2023-06-06) |
AGESA™ firmware |
RomePI 1.0.0.H (2023-11-07) |
DESKTOP
Mitigation details |
AMD Ryzen™ 3000 Series Desktop Processors (Formerly codenamed) “Matisse” |
AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics |
AGESA™ firmware |
ComboAM4v2PI ComboAM4PI |
ComboAM4v2PI |
HIGH END DESKTOP (HEDT)
| Mitigation details Update to versions listed or higher |
AMD Ryzen™ Threadripper™ 3000 Series Processors |
AGESA™ firmware |
CastlePeakPI-SP3r3 1.0.0.A (2023-11-21) |
WORKSTATION
| Mitigation details Update to versions listed or higher |
AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors |
AGESA™ firmware |
CastlePeakWSPI-sWRX8 1.0.0.C ChagallWSPI-sWRX8 1.0.0.7 |
MOBILE - AMD Ryzen™ Series
Mitigation details |
AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics |
AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics |
AMD Ryzen™ 7020 Series Processors (Formerly codenamed) “Mendocino” FT6 |
AGESA™ firmware |
CezannePI-FP6 1.0.1.0 (2024-01-25) |
RenoirPI-FP6 1.0.0.D (2024-02-29) |
MendocinoPI-FT6 1.0.0.6 (2024-01-03) |
Embedded
Mitigation details |
AMD EPYC™ Embedded 7002 |
| AGESA™ firmware | EmbRomePI-SP3 1.0.0.B (2023-12-15) |
Embedded
Mitigation details |
AMD Ryzen™ Embedded V2000 |
| AGESA™ firmware | EmbeddedPI-FP6 1.0.0.9 (2024-04-15) |
Acknowledgement
AMD thanks Tavis Ormandy of Google Information Security Engineering for reporting this issue and engaging in coordinated vulnerability disclosure.
Revisions
Revision Date |
Description |
2024-04-30 |
Updating the mitigation date for AMD Ryzen™ Embedded V2000 |
2024-04-03 |
Updated The following formerly codenamed products: “Renoir” FP6 delivery date to 2/29 “Renoir” AM4 PI version and delivery date to 3/14 “Matisse” mitigation delivery to 3/20 |
2024-02-20 |
Updated mitigation dates for “Matisse”, Lucienne”, “Renoir” |
2024-01-16 |
Added Embedded processors- AMD EPYC™ Embedded 7002, AMD Ryzen™ Embedded V2000 Updated mitigation delivery date for 2nd Gen AMD EPYC™ Processors “Rome” Updated all mitigation dates for Client processors with either a revised target or delivered date. Updated the PI version for AMD Ryzen™ 3000 Series Desktop Processors “Matisse” from 1.0.0.C to 1.0.0.B |
2023-09-14 |
Updated target mitigation for 2nd Gen AMD EPYC™ Processors “Rome” |
2023-07-24 |
Initial publication |
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