Permissions, Privileges, and Access Controls in 3rd Gen AMD EPYC Processors and 4th Gen AMD EPYC Processors - CVE-2023-31347
Published: July 25, 2024
Vulnerability identifier: #VU94742
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-31347
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: AMD
Affected software:
3rd Gen AMD EPYC Processors
4th Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
4th Gen AMD EPYC Processors
Detailed vulnerability description
The vulnerability allows a local user to modify data on other guests.
The vulnerability exists due to improper privilege management in Secure_TSC, SEV firmware. A local user can cause a guest to observe an incorrect TSC when Secure TSC is enabled potentially resulting in a loss of guest integrity.
How to mitigate CVE-2023-31347
Install updates from vendor's website.