CVE-2020-8569 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxU https://github.com/kubernetes-csi/external-snapshotter/issues/380

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5