CVE-2020-10565 : What You Need to Know
Discover the impact of CVE-2020-10565, a vulnerability in grub2-bhyve in FreeBSD bhyve allowing untrusted guests to execute code as root. Learn about affected systems, exploitation, and mitigation steps.
A vulnerability in grub2-bhyve in FreeBSD bhyve allows untrusted guests to execute code as root on the host OS.
Understanding CVE-2020-10565
What is CVE-2020-10565?
grub2-bhyve in FreeBSD bhyve before revision 525916 2020-02-12 does not validate guest-provided addresses, enabling arbitrary read or write operations.
The Impact of CVE-2020-10565
This vulnerability permits untrusted guests to execute code as root on the host OS through the grub-bhyve process.
Technical Details of CVE-2020-10565
Vulnerability Description
The flaw in grub2-bhyve allows guests to perform unauthorized read or write operations via a grub2.cfg file.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions: n/a
Exploitation Mechanism
The vulnerability arises from the lack of address validation in memrw commands by guests.
Mitigation and Prevention
Immediate Steps to Take
- Update to FreeBSD bhyve revision 525916 or later.
- Monitor for any unauthorized code execution attempts.
Long-Term Security Practices
- Implement strict input validation mechanisms.
- Regularly audit and update system configurations.
Patching and Updates
Apply patches provided by FreeBSD to address the vulnerability.