CVE-2023-20526 Information disclosure in 1st Gen AMD EPYC™ Processors
A privileged attacker with physical access can expose ASP memory contents due to insufficient input validation in the bootloader, compromising confidentiality.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-20526?
CVE-2023-20526 is a low-severity vulnerability in Amd Epyc 7232p Firmware, published on 14 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.
Which versions are affected by CVE-2023-20526?
It affects 73 products.
Products include Amd Epyc 7001 Firmware, Amd Epyc 7203 Firmware, Amd Epyc 7203p Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware and 67 more.
How do I fix CVE-2023-20526?
Apply the vendor's patch.
Is CVE-2023-20526 being exploited?
There is no known exploitation of CVE-2023-20526 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
- CVE-2021-26340 A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation
- CVE-2021-26398 Memory corruption in 1st Gen EPYC
- CVE-2021-26331 Code injection in 1st Gen AMD EPYC™
- CVE-2021-26335 Code injection in Athlon™ Series
- CVE-2023-20578 Race condition in AMD EPYC™ 7001 Processors
Sources
Also known as GHSA-6gv5-48rm-6999.