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CVE-2021-25745— Ingress-nginx path can be pointed to service account token file

Quick assessment

Affected
Kubernetes Kubernetes ingress-nginx
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kubernetes ingress-nginx是云原生计算基金会（Cloud Native Computing Foundation）的Kubernetes 的入口控制器，使用NGINX作为反向代理和负载均衡器。 Kubernetes ingress-nginx 存在安全漏洞，目前暂无该漏洞信息，请随时关注CNNVD或厂商公告。

CVSS 7.6 · High EPSS 1.18% · P67
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I. Basic Information for CVE-2021-25745

Vulnerability Information
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Vulnerability Title
Ingress-nginx path can be pointed to service account token file
Source: CVE Program / CVE List V5
Vulnerability Description
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the spec.rules[].http.paths[].path field of an Ingress object (in the networking.k8s.io or extensions API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes ingress-nginx 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubernetes ingress-nginx是云原生计算基金会（Cloud Native Computing Foundation）的Kubernetes 的入口控制器，使用NGINX作为反向代理和负载均衡器。 Kubernetes ingress-nginx 存在安全漏洞，目前暂无该漏洞信息，请随时关注CNNVD或厂商公告。
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 ingress-nginx unspecified ~ 1.2.0 -

II. Public POCs for CVE-2021-25745

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III. Intelligence Information for CVE-2021-25745

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Vendor Advisories for CVE-2021-25745 (1)

Other References for CVE-2021-25745 (2)

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-25745

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