Vulnerability identifier: #VU97953

Vulnerability risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-46772

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
2nd Gen AMD EPYC Processors
Hardware solutions / Firmware
3rd Gen AMD EPYC Processors
Hardware solutions / Firmware

Vendor:

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation in the ABL. A local privileged user with access to the BIOS menu or UEFI shell can tamper with the structure headers in SPI ROM and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.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.