#VU84016 Buffer overflow in 3rd Gen AMD EPYC Processors - CVE-2022-23820

Vulnerability identifier: #VU84016

Vulnerability risk: Low

CVSSv4.0: 4.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-23820

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
3rd Gen AMD EPYC Processors
Hardware solutions / Firmware

Vendor: AMD

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper validation of the AMD SMM communication buffer. A local user can corrupt the SMRAM and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

3rd Gen AMD EPYC Processors: before MilanPI 1.0.0.3

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External links
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3002.html

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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.