PT-2023-1405 · Amd · Amd Secure Encrypted Virtualization (Sev) Firmware

Published 2023-01-10 · Updated 2023-08-08 · CVE-2021-46768

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 Secure Encrypted Virtualization (SEV) firmware (affected versions not specified)

Description The issue is related to insufficient input validation in the SEV firmware, which may allow an attacker to perform out-of-bounds memory reads within the ASP boot loader. This could potentially lead to a denial of service. The vulnerability is associated with a buffer overflow in the memory due to inadequate input validation, and its exploitation may enable a remote attacker to disclose protected information.

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

RCE

Out of bounds Read

Buffer Overflow

Weakness Enumeration

CWE-20

CWE-125

CWE-119

Related Identifiers

BDU:2023-00785

CVE-2021-46768

Affected Products

Amd Secure Encrypted Virtualization (Sev) Firmware

References · 6

• https://amd.com/en/corporate/product-security/bulletin/AMD-SB-1032 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46768 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46768 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00785 · Security Note
• https://support.lenovo.com/us/en/product_security/LEN-87730 · Note
• https://vuldb.com/ru/?id.217992 · Note