CVE-2023-20578

Description

A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory amd.com
Affected: AMD AMD EPYC™ 7001 Processors
Affected: AMD AMD EPYC™ 7002 Processors
Affected: AMD AMD EPYC™ 7003 Processors
Affected: AMD AMD EPYC™ 9004 Processors
Affected: AMD AMD Ryzen™ 7000 Series Desktop Processors
Affected: AMD AMD Ryzen™ Threadripper™ PRO 5000WX Processors
Affected: AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics
Affected: AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics
Affected: AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics
Affected: AMD AMD EPYC™ Embedded 3000
Affected: AMD AMD EPYC™ Embedded 7002
Affected: AMD AMD EPYC™ Embedded 7003
Affected: AMD AMD EPYC™ Embedded 9003
Affected: AMD AMD Ryzen™ Embedded 7000
Affected: AMD AMD RyzenTM Embedded V3000
Published at:
Updated at:

References

Link Tags
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-20578?
CVE-2023-20578 has been scored as a high severity vulnerability.
How to fix CVE-2023-20578?
To fix CVE-2023-20578, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-20578 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-20578 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-20578?
CVE-2023-20578 affects AMD AMD EPYC™ 7001 Processors, AMD AMD EPYC™ 7002 Processors, AMD AMD EPYC™ 7003 Processors, AMD AMD EPYC™ 9004 Processors, AMD AMD Ryzen™ 7000 Series Desktop Processors, AMD AMD Ryzen™ Threadripper™ PRO 5000WX Processors, AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics, AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics, AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics, AMD AMD EPYC™ Embedded 3000, AMD AMD EPYC™ Embedded 7002, AMD AMD EPYC™ Embedded 7003, AMD AMD EPYC™ Embedded 9003, AMD AMD Ryzen™ Embedded 7000, AMD AMD RyzenTM Embedded V3000.
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