CVE-2023-20523 Race condition in 2nd Gen EPYC
A physical attacker can exploit a time-of-check time-of-use race condition in AMD EPYC firmware to write beyond buffer bounds, causing integrity loss or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-20523?
CVE-2023-20523 is a medium-severity vulnerability in Amd Epyc 7232p Firmware, published on 10 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service.
Weakness: CWE-367
Which versions are affected by CVE-2023-20523?
It affects 50 products.
Products include Amd Epyc 7002 Firmware, Amd Epyc 7003 Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware and 44 more.
How do I fix CVE-2023-20523?
No fix has been published for CVE-2023-20523 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-20523 being exploited?
There is no known exploitation of CVE-2023-20523 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-4p53-c8jq-g93h.