PT-2021-17002 · Amd · Amd Sev Firmware

Cfir Cohen + 2 · Published 2021-11-16 · Updated 2021-11-18 · CVE-2021-26320

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions AMD SEV Firmware (affected versions not specified)

Description The issue is related to insufficient validation of the AMD SEV Signing Key (ASK) in the SEND START command in the SEV Firmware. This may allow a local authenticated attacker to perform a denial of service of the PSP.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2021-26320

Affected Products

Amd Sev Firmware

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2021-26320 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26320 · Vendor Advisory
• https://amd.com/en/corporate/product-security/bulletin/amd-sb-1021 · Vendor Advisory