Vulnerability identifier: #VU79242

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-20555

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
AMD Ryzen 3000 Series Desktop processors
Hardware solutions / Firmware
AMD Ryzen 5000 Series Desktop Processors
Hardware solutions / Firmware
AMD Ryzen 5000 Series Desktop processor with Radeon graphics
Hardware solutions / Firmware
AMD Ryzen 7000 Series Processors
Hardware solutions / Firmware
AMD Athlon 3000 Series Desktop Processors with Radeon Graphics
Hardware solutions / Firmware
AMD Ryzen 4000 Series Desktop processors with Radeon graphics
Hardware solutions / Firmware
AMD Athlon 3000 Series Mobile processors with Radeon Graphics
Hardware solutions / Firmware
AMD Ryzen 3000 Series Mobile Processors with Radeon Graphics
Hardware solutions / Firmware
AMD Ryzen 4000 Series Mobile processors with Radeon graphics
Hardware solutions / Firmware
AMD Ryzen 5000 Series Mobile processors with Radeon graphics
Hardware solutions / Firmware
AMD Ryzen 6000 Series Mobile Processors
Hardware solutions / Firmware
AMD Ryzen 7030 Series Mobile Processors
Hardware solutions / Firmware
AMD Ryzen 7020 Series Mobile Processors
Hardware solutions / Firmware

Vendor:

Description

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

The vulnerability exists due to a boundary error within the CpmDisplayFeatureSmm in SMM driver. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.

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-4003.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.