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CVE-2020-17376

8.3 · HIGH

An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0.

Published Aug 26, 2020CWE-611EPSS 1.73%

Overview

CVE-2020-17376 is a high-severity vulnerability. It was published on August 26, 2020 and has a CVSS 3.1 base score of 8.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously undergone live migration, a user may gain access to destination host devices that share the same paths as host devices previously referenced by the virtual machine on the source host. This can include block devices that map to different Cinder volumes at the destination than at the source. Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected.

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

Refwww.openwall.com/lists/oss-security/2020/08/25/4Reflaunchpad.net/bugs/1890501Refsecurity.openstack.org/ossa/OSSA-2020-006.htmlRefwww.openwall.com/lists/oss-security/2020/08/25/4Reflaunchpad.net/bugs/1890501Refsecurity.openstack.org/ossa/OSSA-2020-006.html

How CyberStrike helps

Frequently asked questions

What is CVE-2020-17376?

CVE-2020-17376 is a high-severity vulnerability. It was published on August 26, 2020 and has a CVSS 3.1 base score of 8.3 (HIGH).

How severe is CVE-2020-17376?

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-17376?

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-2020-17376?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-17376 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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