CVE-2023-34321 arm32: The cache may not be properly cleaned/invalidated
An integer overflow in Xen's arm32 cache helpers may skip cache invalidation, allowing guest memory writes to be lost or stale data to be read.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-34321?
CVE-2023-34321 is a low-severity vulnerability in Xen Xen, published on 5 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest.
Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory.
Weakness: CWE-119
Which versions are affected by CVE-2023-34321?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2023-34321?
Apply the vendor's patch.
Is CVE-2023-34321 being exploited?
There is no known exploitation of CVE-2023-34321 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as ALPINE-CVE-2023-34321, DEBIAN-CVE-2023-34321, GHSA-p5q9-hxvv-3rqq, UBUNTU-CVE-2023-34321.