CVE-2023-4949 Memory Corruption Vulnerability in Grub-Legacy's XFS Implementation
A local attacker can exploit memory corruption in Grub-Legacy's XFS implementation via a modified partition to execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-4949?
CVE-2023-4949 is a high-severity memory corruption vulnerability in Xen Xen, published on 10 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An attacker with local access to a system (either through a disk or external drive) can present a modified XFS partition to grub-legacy in such a way to exploit a memory corruption in grub’s XFS file system implementation.
Which versions are affected by CVE-2023-4949?
It affects 2 products.
Products include Gnu Grub, Xen Xen.
How do I fix CVE-2023-4949?
No fix has been published for CVE-2023-4949 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-2023-4949 being exploited?
There is no known exploitation of CVE-2023-4949 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as DEBIAN-CVE-2023-4949.