CVE-2023-20527 Denial of service in 1st Gen EPYC
A privileged attacker can trigger an out-of-bounds memory read in the AMD EPYC ASP Bootloader, causing a denial-of-service condition.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-20527?
CVE-2023-20527 is a medium-severity denial of service vulnerability in Amd Epyc 7232p Firmware, published on 10 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper syscall input validation in the ASP Bootloader may allow a privileged attacker to read memory out-of-bounds, potentially leading to a denial-of-service.
Weakness: CWE-20
Which versions are affected by CVE-2023-20527?
It affects 64 products.
Products include Amd Epyc 7001 Firmware, Amd Epyc 7002 Firmware, Amd Epyc 7003 Firmware, Amd Epyc 7232p Firmware, Amd Epyc 7251 Firmware, Amd Epyc 7252 Firmware and 58 more.
How do I fix CVE-2023-20527?
No fix has been published for CVE-2023-20527 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-20527 being exploited?
There is no known exploitation of CVE-2023-20527 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-fg26-2429-pm48.