CVE-2021-25748

2023-05-2417:15:09

CWE-20

[email protected]

web.nvd.nist.gov

ingress-nginx

cve-2021-25748

security issue

kubernetes

networking

api

access control

credentials

cluster secrets

7.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

23.2%

JSON

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of 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.

Affected configurations

NVD

Node

kubernetesingress-nginxRange<1.2.1

CPENameOperatorVersion
kubernetes:ingress-nginxkubernetes ingress-nginxlt1.2.1

CPE	Name	Operator	Version
kubernetes:ingress-nginx	kubernetes ingress-nginx	lt	1.2.1

CNA Affected

[
  {
    "vendor": "Kubernetes",
    "product": "Kubernetes ingress-nginx",
    "versions": [
      {
        "version": "unspecified",
        "lessThan": "1.2.1",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]