PT-2023-1484 · Amd · Amd Secure Encrypted Virtualization

CVE-2021-26403 · Publicado 2023-01-10 · Atualizado 2025-04-08

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Média

Vetor base

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

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

Description The issue is related to insufficient input validation in the implementation of AMD Secure Encrypted Virtualization (SEV) microcode in AMD processors. This could allow an attacker to gain unauthorized access to protected information. Specifically, insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret, potentially resulting in the compromise of VM confidentiality.

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

Insufficient Verification of Data Authenticity

RCE

Enumeração de Fraquezas

CWE-345

CWE-20

Identificadores relacionados

BDU:2023-00894

CVE-2021-26403

Produtos afetados

Amd Secure Encrypted Virtualization

Referências · 7

• https://amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2021-26403 · Nota de Segurança
• https://bdu.fstec.ru/vul/2023-00894 · Nota de Segurança
• https://support.lenovo.com/us/en/product_security/LEN-87730 · Nota
• https://amd.com/en/corporate/product-security/bulletin/amd-sb-1032 · Nota
• https://osv.dev/vulnerability/CVE-2021-26403 · Aviso do Fabricante
• https://t.me/cvenotify/118377 · Publicação no Telegram