Multiple vulnerabilities in SEV-SNP firmware on AMD processors

Published: 2024-07-25

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-31346 CVE-2023-31347
CWE-ID	CWE-665 CWE-264
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	3rd Gen AMD EPYC Processors Hardware solutions / Firmware 4th Gen AMD EPYC Processors Hardware solutions / Firmware
Vendor	AMD

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Initialization

EUVDB-ID: #VU94741

Risk: Low

CVSSv3.1: 2.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-31346

CWE-ID: CWE-665 - Improper Initialization

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to improper initialization in SEV Firmware. A local user can run a specially crafted application to access stale data from other guests.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

3rd Gen AMD EPYC Processors: All versions

4th Gen AMD EPYC Processors: All versions

External links

http://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3007

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU94742