Insufficient Validation Vulnerability in AMD SEV Firmware
CVE-2021-26320

5.5MEDIUM

Key Information:

Vendor
Amd
Status
1st Gen Amd Epyc™
2nd Gen Amd Epyc™
3rd Gen Amd Epyc™
Vendor
CVE Published:
16 November 2021

Summary

A vulnerability exists in the AMD SEV Firmware due to insufficient validation of the AMD SEV Signing Key (ASK) during the SEND_START command. This security flaw could allow a local authenticated attacker to execute a denial of service attack against the Platform Security Processor (PSP), potentially impacting system availability and integrity. Users are advised to review security advisories and apply necessary patches to their systems.

Affected Version(s)

1st Gen AMD EPYC™ < unspecified

2nd Gen AMD EPYC™ < unspecified

3rd Gen AMD EPYC™ < unspecified

References

https://www.amd.com/en/corporate/product-security/bulleti...
x_refsource_MISC

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.