CVE-2023-31355 Memory corruption in 3rd Gen AMD EPYC™ Processors
A malicious hypervisor can overwrite guest UMC seed to read memory from decommissioned guests, affecting AMD EPYC processors.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-31355?
CVE-2023-31355 is a medium-severity memory corruption vulnerability in Amd Epyc 72f3 Firmware, published on 5 Aug 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC seed potentially allowing reading of memory from a decommissioned guest.
Which versions are affected by CVE-2023-31355?
It affects 86 products.
Products include Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 72f3 Firmware, Amd Epyc 7303 Firmware, Amd Epyc 7303p Firmware, Amd Epyc 7313 Firmware and 80 more.
How do I fix CVE-2023-31355?
No fix has been published for CVE-2023-31355 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-31355 being exploited?
There is no known exploitation of CVE-2023-31355 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Amd Epyc 72f3 Firmware
- CVE-2024-21980 Memory corruption in 3rd Gen AMD EPYC™ Processors
- CVE-2023-20591 Other in AMD EPYC™ 7003 Series Processors
- CVE-2023-20533 Denial of service in 2nd Gen AMD EPYC™ Processors
- CVE-2024-21978 Information disclosure in 3rd Gen AMD EPYC™ Processors
- CVE-2023-31346 Information disclosure in 3rd Gen AMD EPYC™ Processors
Sources
Also known as GHSA-x6rx-7w39-qpg5.