CVE-2020-8569— Kubernetes CSI snapshot-controller DoS
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I. Basic Information for CVE-2020-8569
Vulnerability Information
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Vulnerability Title
Kubernetes CSI snapshot-controller DoS
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Kubernetes 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubernetes是美国Linux基金会的一套开源的Docker容器集群管理系统。该系统为容器化的应用提供资源调度、部署运行、服务发现和扩容缩容等功能。 Kubernetes CSI snapshot-controller prior to v2.1.3 and v3.0.2 存在代码问题漏洞，该漏洞禁止用户对其卷进行快照或删除快照。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Kubernetes | CSI Snapshotter | snapshot-controller v3.0 ~ v3.0.1 | - |
II. Public POCs for CVE-2020-8569
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|---|
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Same Patch Batch · Kubernetes · 2021-01-21 · 5 CVEs total
| CVE-2020-8554 | 6.3 MEDIUM | Kubernetes man in the middle using LoadBalancer or ExternalIPs |
| CVE-2020-8568 | 5.8 MEDIUM | Kubernetes Secrets Store CSI Driver sync/rotate directory traversal |
| CVE-2020-8567 | 4.9 MEDIUM | Kubernetes Secrets Store CSI Driver plugin directory traversals |
| CVE-2020-8570 | Kubernetes Java client libraries unvalidated path traversal in Copy implementation |
IV. Related Vulnerabilities
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Same weakness: CWE-476
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