CVE-2020-8569

Description

Kubernetes CSI snapshot-controller prior to v2.1.3 and v3.0.2 could panic when processing a VolumeSnapshot custom resource when: - The VolumeSnapshot referenced a non-existing PersistentVolumeClaim and the VolumeSnapshot did not reference any VolumeSnapshotClass. - The snapshot-controller crashes, is automatically restarted by Kubernetes, and processes the same VolumeSnapshot custom resource after the restart, entering an endless crashloop. Only the volume snapshot feature is affected by this vulnerability. When exploited, users can’t take snapshots of their volumes or delete the snapshots. All other Kubernetes functionality is not affected.

How to fix CVE-2020-8569

To remediate CVE-2020-8569, upgrade the affected package to a fixed version below.

• —upgrade to 2.1.3 or later
• —upgrade to 3.0.2 or later

Is CVE-2020-8569 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• >= 2.0.0, < 2.1.3
• >= 3.0.0, < 3.0.2

CVSS scores

References (3)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-8569
• WEBgithub.com/kubernetes-csi/external-snapshotter/issues/380
• WEBgroups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxU