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CVE-2019-10166

7.8 · HIGH

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…

Published Aug 2, 2019CWE-284EPSS 0.47%

Overview

CVE-2019-10166 is a high-severity vulnerability. It was published on August 2, 2019 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/libvirt-privesc-vulnerabilitiesRefbugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10166Refsecurity.gentoo.org/glsa/202003-18Refaccess.redhat.com/libvirt-privesc-vulnerabilitiesRefbugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10166Refsecurity.gentoo.org/glsa/202003-18

How CyberStrike helps

Frequently asked questions

What is CVE-2019-10166?

CVE-2019-10166 is a high-severity vulnerability. It was published on August 2, 2019 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2019-10166?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-10166?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-10166?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-10166 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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