CVE-2021-25737— Holes in EndpointSlice Validation Enable Host Network Hijack
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I. Basic Information for CVE-2021-25737
Vulnerability Information
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Vulnerability Title
Holes in EndpointSlice Validation Enable Host Network Hijack
Source: NVD (National Vulnerability Database)
Vulnerability Description
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
不完整的黑名单
Source: NVD (National Vulnerability Database)
Vulnerability Title
Kubernetes 输入验证错误漏洞
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 kube-apiserver存在输入验证错误漏洞，攻击者可利用该漏洞可以通过Kubernetes kube-apiserver的Pod流量重定向绕过对数据的访问限制，从而获取敏感信息。
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 ~ 1.18.18 | - |
II. Public POCs for CVE-2021-25737
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/kubernetes/kubernetes/issues/102106x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211004-0004/x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-25737
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V. Comments for CVE-2021-25737
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