CVE-2020-10717 Denial of service in QEMU
A guest user can cause a denial of service on the host by exhausting file descriptors in the virtio-fs shared directory.
- 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-2020-10717?
CVE-2020-10717 is a low-severity denial of service vulnerability in Qemu Qemu, published on 4 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A potential DoS flaw was found in the virtio-fs shared file system daemon (virtiofsd) implementation of the QEMU version >= v5.0. Virtio-fs is meant to share a host file system directory with a guest via virtio-fs device. If the guest opens the maximum number of file descriptors under the shared directory, a denial of service may occur. This flaw allows a guest user/process to cause this denial of service on the host.
Weakness: CWE-770
Which versions are affected by CVE-2020-10717?
It affects 1 product.
Products include Qemu Qemu.
How do I fix CVE-2020-10717?
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-2020-10717 being exploited?
There is no known exploitation of CVE-2020-10717 in the wild and no public exploit code.
Other vulnerabilities in Qemu Qemu
Sources
Also known as DEBIAN-CVE-2020-10717, GHSA-mjrj-9494-78rr.