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CVE-2022-3294— Node address isn't always verified when proxying

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（K8s）是云原生计算基金会（Cloud Native Computing Foundation）的一个开源系统，用于自动部署、扩展和管理容器化应用程序。 Kubernetes kube-apiserver存在安全漏洞，该漏洞源于攻击者可以通过节点地址绕过对数据的访问限制，从而读取敏感信息。

CVSS 6.6 · Medium EPSS 1.62% · P75
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I. Basic Information for CVE-2022-3294

Vulnerability Information
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Vulnerability Title
Node address isn't always verified when proxying
Source: CVE Program / CVE List V5
Vulnerability Description
Users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can modify Node objects and send proxy requests to them. Kubernetes supports node proxying, which allows clients of kube-apiserver to access endpoints of a Kubelet to establish connections to Pods, retrieve container logs, and more. While Kubernetes already validates the proxying address for Nodes, a bug in kube-apiserver made it possible to bypass this validation. Bypassing this validation could allow authenticated requests destined for Nodes to to the API server's private network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubernetes（K8s）是云原生计算基金会（Cloud Native Computing Foundation）的一个开源系统，用于自动部署、扩展和管理容器化应用程序。 Kubernetes kube-apiserver存在安全漏洞，该漏洞源于攻击者可以通过节点地址绕过对数据的访问限制，从而读取敏感信息。
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 unspecified ~ v1.25.3 -

II. Public POCs for CVE-2022-3294

# POC Description Source Link Shenlong Link
1 Privilege Escalation using nodes/proxy (create action allowed) and nodes/status (update/patch actions allowed) https://github.com/arbaaz29/CVE-2022-3294 POC Details
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III. Intelligence Information for CVE-2022-3294

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Vendor Advisories for CVE-2022-3294 (1)

Other References for CVE-2022-3294 (2)

IV. Related Vulnerabilities

Same product: Kubernetes
Same vendor: Kubernetes
Same weakness: CWE-20

V. Comments for CVE-2022-3294

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