CVE-2020-8569: kubernetes container_storage_interface_snapshotter NULL Pointer Dereference
Vulnerability summary
CVE-2020-8569 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in kubernetes container_storage_interface_snapshotter. EPSS estimates a 2.21% chance of exploitation in the next 30 days, higher than 82.3% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 21-01-2021PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- CVE.orgCNA4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · GoEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.21%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
-0.06 pp
From 2.27% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExternal Snapshotter
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Github.com/kubernetes-csi/external-snapshotter2 products
- v2≥ 2.0.0, < 2.1.3
- v3≥ 3.0.0, < 3.0.2
Kubernetes2 products
- container_storage_interface_snapshotter≥ 2.1.0, < 2.1.3 | ≥ 3.0.0, < 3.0.2
- csi snapshotter≥ snapshot-controller v3.0, ≤ v3.0.1 | ≥ snapshot-controller v2.1, ≤ v2.1.2
2 vendors · 4 products
References
3 links- groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxUX Refsource MISCWEBMailing ListThird Party Advisory
- github.com/kubernetes-csi/external-snapshotter/issues/380X Refsource MISCWEBExploitThird Party Advisory
