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CVE-2020-8570— Kubernetes Java client libraries unvalidated path traversal in Copy implementation

Quick assessment

Affected
Kubernetes Kubernetes Java Client
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 10.0.0 和 9.0.1之前版本存在安全漏洞，攻击者可以通过Kubernetes Java Client的Pod Copy遍历目录。

AI Predicted 7.5 Difficulty: Moderate EPSS 3.64% · P89
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I. Basic Information for CVE-2020-8570

Vulnerability Information
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Vulnerability Title
Kubernetes Java client libraries unvalidated path traversal in Copy implementation
Source: CVE Program / CVE List V5
Vulnerability Description
Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes 路径遍历漏洞
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 10.0.0 和 9.0.1之前版本存在安全漏洞，攻击者可以通过Kubernetes Java Client的Pod Copy遍历目录。
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 Kubernetes Java Client all versions prior to 9.0 -

II. Public POCs for CVE-2020-8570

# POC Description Source Link Shenlong Link
1 None https://github.com/shoucheng3/kubernetes-client__java_CVE-2020-8570_client-java-parent-9-0-1 POC Details
2 None https://github.com/shoucheng3/kubernetes-client__java_CVE-2020-8570_client-java-parent-9_0_2_fixed POC Details
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III. Intelligence Information for CVE-2020-8570

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Mailing List Discussions for CVE-2020-8570 (3)

Other References for CVE-2020-8570 (2)

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-2020-8569 4.3 MEDIUM Kubernetes CSI snapshot-controller DoS

IV. Related Vulnerabilities

Same product: Kubernetes Java Client
Same vendor: Kubernetes
Same weakness: CWE-23

V. Comments for CVE-2020-8570

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