CVE-2019-20808 Denial of service in n/a
A malicious guest can crash the QEMU process via an out-of-bounds read in the ATI VGA implementation, 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-2019-20808?
CVE-2019-20808 is a medium-severity denial of service vulnerability in Qemu Qemu, published on 31 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.
Weakness: CWE-125
Which versions are affected by CVE-2019-20808?
It affects 1 product.
Products include Qemu Qemu.
How do I fix CVE-2019-20808?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-20808 being exploited?
There is no known exploitation of CVE-2019-20808 in the wild and no public exploit code.
Other vulnerabilities in Qemu Qemu
Sources
Also known as DEBIAN-CVE-2019-20808, GHSA-p8fx-hg9x-79mx.