CVE-2023-20520 Memory corruption in 1st Gen AMD EPYC™
An attacker can exploit improper access control in the AMD EPYC Bootloader to cause a stack-based buffer overrun, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-20520?
CVE-2023-20520 is a critical memory corruption vulnerability in Amd Epyc 7232p Firmware, published on 9 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper access control settings in ASP Bootloader may allow an attacker to corrupt the return address causing a stack-based buffer overrun potentially leading to arbitrary code execution.
Weakness: CWE-787
Which versions are affected by CVE-2023-20520?
It affects 63 products.
Products include Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7261 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware and 57 more.
How do I fix CVE-2023-20520?
No fix has been published for CVE-2023-20520 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-2023-20520 being exploited?
There is no known exploitation of CVE-2023-20520 in the wild and no public exploit code.
Other vulnerabilities in Amd Epyc 7232p Firmware
Sources
Also known as GHSA-wmqm-rr3q-7g8h.