CVE-2017-2633 Memory corruption in Qemu:

Medium 5.4 Published 27 Jul 2018 Updated 5 Aug 2024

A guest user can crash the QEMU process via an out-of-bounds memory access in the VNC display driver, causing denial of service.

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-2017-2633?

CVE-2017-2633 is a medium-severity memory corruption vulnerability in Qemu Qemu, published on 27 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.

Weakness: CWE-787, CWE-125, CWE-120

Which versions are affected by CVE-2017-2633?

It affects 6 products.

Products include Qemu Qemu, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Workstation.

How do I fix CVE-2017-2633?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2017-2633 being exploited?

There is no known exploitation of CVE-2017-2633 in the wild and no public exploit code.

All Qemu Qemu vulnerabilities

Sources

Also known as DEBIAN-CVE-2017-2633, GHSA-c46f-47cq-c2fg, UBUNTU-CVE-2017-2633.