CVE-2019-10166 Missing authorization in libvirt

High 7.8 Published 2 Aug 2019 Updated 4 Aug 2024

Local attackers can modify managed save files via an unprotected API to execute arbitrary code with libvirtd privileges.

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-2019-10166?

CVE-2019-10166 is a high-severity missing authorization vulnerability in Redhat Enterprise Linux, published on 2 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

It was discovered that libvirtd, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, would permit readonly clients to use the virDomainManagedSaveDefineXML() API, which would permit them to modify managed save state files. If a managed save had already been created by a privileged user, a local attacker could modify this file such that libvirtd would execute an arbitrary program when the domain was resumed.

Weakness: CWE-284

Which versions are affected by CVE-2019-10166?

It affects 9 products.

Products include Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Server Tus and 3 more.

How do I fix CVE-2019-10166?

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-2019-10166 being exploited?

There is no known exploitation of CVE-2019-10166 in the wild and no public exploit code.

All Redhat Enterprise Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2019-10166, DEBIAN-CVE-2019-10166, GHSA-g9cg-gvh5-48hm, UBUNTU-CVE-2019-10166.