PT-2023-1404 · Amd · Amd Secure Encrypted Virtualization-Encrypted State

Published 2023-01-10 · Updated 2023-01-19 · CVE-2021-26409

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions AMD Secure Encrypted Virtualization-Encrypted State (SEV-ES) (affected versions not specified)

Description The issue is related to insufficient bounds checking in the implementation of AMD Secure Encrypted Virtualization-Encrypted State (SEV-ES) technology, which may allow an attacker to corrupt Reverse Map table (RMP) memory. This could potentially result in a loss of Secure Nested Paging (SNP) memory integrity, allowing the disclosure of protected information.

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

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2023-00784

CVE-2021-26409

Affected Products

Amd Secure Encrypted Virtualization-Encrypted State

References · 6

• https://bdu.fstec.ru/vul/2023-00784 · Security Note
• https://amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26409 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26409 · Vendor Advisory
• https://support.lenovo.com/us/en/product_security/LEN-87730 · Note
• https://t.me/cvenotify/42362 · Telegram Post