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CVE-2020-8554— Kubernetes man in the middle using LoadBalancer or ExternalIPs

Quick assessment

Affected
Kubernetes Kubernetes
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 存在安全漏洞，攻击者可利用该漏洞可以通过Kubernetes上的LoadBalancer ExternalIP充当中间人，以便在会话中读取或写入数据。

CVSS 6.3 · Medium EPSS 9.27% · P95

Affected Version Matrix 1

VendorProduct Version RangeStatus
Kubernetes Kubernetes < * affected
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I. Basic Information for CVE-2020-8554

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Kubernetes man in the middle using LoadBalancer or ExternalIPs
Source: CVE Program / CVE List V5
Vulnerability Description
Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未经验证的属主
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes 安全漏洞
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 存在安全漏洞，攻击者可利用该漏洞可以通过Kubernetes上的LoadBalancer ExternalIP充当中间人，以便在会话中读取或写入数据。
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 0 ~ * -

II. Public POCs for CVE-2020-8554

# POC Description Source Link Shenlong Link
1 CVE-2020-8554: Man in the middle using LoadBalancer or ExternalIPs https://github.com/rancher/externalip-webhook POC Details
2 Mitigate CVE-2020-8554 with Policy Controller in Anthos https://github.com/jrmurray000/CVE-2020-8554 POC Details
3 Prisma Cloud Compute Admission rules to mitigate Kubernetes CVE-2020-8554 https://github.com/twistlock/k8s-cve-2020-8554-mitigations POC Details
4 None https://github.com/Dviejopomata/CVE-2020-8554 POC Details
5 None https://github.com/alebedev87/gatekeeper-cve-2020-8554 POC Details
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III. Intelligence Information for CVE-2020-8554

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Vendor Advisories for CVE-2020-8554 (3)

Mailing List Discussions for CVE-2020-8554 (3)

Security Blog Posts for CVE-2020-8554 (1)

Other References for CVE-2020-8554 (2)

Same Patch Batch · Kubernetes · 2021-01-21 · 5 CVEs total

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

IV. Related Vulnerabilities

Same product: Kubernetes
Same vendor: Kubernetes
Same weakness: CWE-283

V. Comments for CVE-2020-8554

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