CVE-2020-10701 Missing authorization in libvirt
Unprivileged users with read-only access can set QEMU guest agent timeouts to zero, causing command failures and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-10701?
CVE-2020-10701 is a medium-severity missing authorization vulnerability in Redhat Libvirt, published on 27 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A missing authorization flaw was found in the libvirt API responsible for changing the QEMU agent response timeout. This flaw allows read-only connections to adjust the time that libvirt waits for the QEMU guest agent to respond to agent commands. Depending on the timeout value that is set, this flaw can make guest agent commands fail because the agent cannot respond in time. Unprivileged users with a read-only connection could abuse this flaw to set the response timeout for all guest agent messages to zero, potentially leading to a denial of service. This flaw affects libvirt versions before 6.2.0.
Weakness: CWE-862
Which versions are affected by CVE-2020-10701?
It affects 1 product.
Products include Redhat Libvirt.
How do I fix CVE-2020-10701?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-10701 being exploited?
There is no known exploitation of CVE-2020-10701 in the wild and no public exploit code.
Other vulnerabilities in Redhat Libvirt
Sources
Also known as AZL-6657, DEBIAN-CVE-2020-10701, GHSA-rhq9-pr9r-9x2j.