Vulnerability identifier: #VU97949

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-46746

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
1st Gen AMD EPYC Processors
Hardware solutions / Firmware
2nd Gen AMD EPYC Processors
Hardware solutions / Firmware
3rd Gen AMD EPYC Processors
Hardware solutions / Firmware
4th Gen AMD EPYC Processors
Hardware solutions / Firmware

Vendor: AMD

Description

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

The vulnerability exists due to a boundary error in ASP Secure OS Trusted Execution Environment (TEE). A local privileged user with access to AMD signing keys can trigger a stack-based buffer overflow and perform a denial of service (DoS) attack.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

The vendor is not planning to release a security patch to address this vulnerability.

Vulnerable software versions

1st Gen AMD EPYC Processors: All versions

2nd Gen AMD EPYC Processors: All versions

3rd Gen AMD EPYC Processors: All versions

4th Gen AMD EPYC Processors: All 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.