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CVE-2020-8569

MEDIUM
Published 2021-01-21T17:09:21.567240Z
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CVSS Score

V3.1
4.3
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.003
probability
of exploitation in the wild

There is a 0.3% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.566
Higher than 56.6% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
LOW

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Kubernetes

CSI Snapshotter

Affected Versions:

snapshot-controller v3.0 snapshot-controller v2.1

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

NULL Pointer Dereference in Kubernetes CSI snapshot-controller

GHSA-hwrr-rhmm-vcvf

Advisory Details

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.

Affected Packages

Go github.com/kubernetes-csi/external-snapshotter/v2
ECOSYSTEM: ≥2.0.0 <2.1.3
Go github.com/kubernetes-csi/external-snapshotter/v3
ECOSYSTEM: ≥3.0.0 <3.0.2

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-8569
WEB https://github.com/kubernetes-csi/external-snapshotter/issues/380
WEB https://groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxU

Advisory provided by GitHub Security Advisory Database. Published: February 15, 2022, Modified: May 12, 2021

References

https://groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxU
https://github.com/kubernetes-csi/external-snapshotter/issues/380
Published: 2021-01-21T17:09:21.567240Z
Last Modified: 2024-09-17T01:47:07.863Z
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