CVE-2020-10565 Memory corruption in n/a
An untrusted guest can execute arbitrary code as root on the host via improper address validation in grub2-bhyve.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-10565?
CVE-2020-10565 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 14 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, does not validate the address provided as part of a memrw command (read_* or write_*) by a guest through a grub2.cfg file. This allows an untrusted guest to perform arbitrary read or write operations in the context of the grub-bhyve process, resulting in code execution as root on the host OS.
Weakness: CWE-119
Which versions are affected by CVE-2020-10565?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2020-10565?
No fix has been published for CVE-2020-10565 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-2020-10565 being exploited?
There is no known exploitation of CVE-2020-10565 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-2x5v-f8wh-jpf6.