CVE-2022-23092 Missing bounds check in 9p message handling
A missing bounds check in lib9p allows a malicious guest kernel to overwrite host memory, potentially leading to code execution within the bhyve process.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2022-23092?
CVE-2022-23092 is a high-severity memory corruption vulnerability in Freebsd Freebsd, published on 15 Feb 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The implementation of lib9p's handling of RWALK messages was missing a bounds check needed when unpacking the message contents. The missing check means that the receipt of a specially crafted message will cause lib9p to overwrite unrelated memory.
The bug can be triggered by a malicious bhyve guest kernel to overwrite memory in the bhyve(8) process. This could potentially lead to user-mode code execution on the host, subject to bhyve's Capsicum sandbox.
Weakness: CWE-787
Which versions are affected by CVE-2022-23092?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2022-23092?
No fix has been published for CVE-2022-23092 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-2022-23092 being exploited?
There is no known exploitation of CVE-2022-23092 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-gvf3-496w-8fm9.