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[email protected]CVE-2020-8561

HistorySep 20, 2021 - 5:15 p.m.

CVE-2020-8561

2021-09-2017:15:08

CWE-441

CWE-610

[email protected]

web.nvd.nist.gov

kubernetes

security issue

cve-2020-8561

actors

kube-apiserver

mutatingwebhookconfiguration

validatingwebhookconfiguration

nvd

4 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:S/C:P/I:N/A:N

4.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

4.1 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

33.6%

JSON

A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.

Affected configurations

NVD

Node

kuberneteskubernetesMatch1.20.11-

kuberneteskubernetesMatch1.21.5-

kuberneteskubernetesMatch1.22.2-

CPENameOperatorVersion
kubernetes:kuberneteskuberneteseq1.20.11
kubernetes:kuberneteskuberneteseq1.21.5
kubernetes:kuberneteskuberneteseq1.22.2

CPE	Name	Operator	Version
kubernetes:kubernetes	kubernetes	eq	1.20.11
kubernetes:kubernetes	kubernetes	eq	1.21.5
kubernetes:kubernetes	kubernetes	eq	1.22.2

CNA Affected

[
  {
    "product": "Kubernetes",
    "vendor": "Kubernetes",
    "versions": [
      {
        "lessThanOrEqual": "1.20.11",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unknown",
        "version": "next of 1.20.11",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "1.21.5",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unknown",
        "version": "next of 1.21.5",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "1.22.2",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "unspecified",
        "status": "unknown",
        "version": "next of 1.22.2",
        "versionType": "custom"
      }
    ]
  }
]