CVE-2020-8559 Privilege escalation from compromised node to cluster

2020-07-1500:00:00

CWE-601

kubernetes

www.cve.org

6.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

6.7 Medium

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

71.6%

JSON

The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.

CNA Affected

[
  {
    "product": "Kubernetes",
    "vendor": "Kubernetes",
    "versions": [
      {
        "status": "affected",
        "version": "1.6"
      },
      {
        "status": "affected",
        "version": "1.7"
      },
      {
        "status": "affected",
        "version": "1.8"
      },
      {
        "status": "affected",
        "version": "1.9"
      },
      {
        "status": "affected",
        "version": "1.10"
      },
      {
        "status": "affected",
        "version": "1.11"
      },
      {
        "status": "affected",
        "version": "1.12"
      },
      {
        "status": "affected",
        "version": "1.13"
      },
      {
        "status": "affected",
        "version": "1.14"
      },
      {
        "status": "affected",
        "version": "1.15"
      },
      {
        "lessThanOrEqual": "1.16.12",
        "status": "affected",
        "version": "1.16",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "1.17.8",
        "status": "affected",
        "version": "1.17",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "1.18.5",
        "status": "affected",
        "version": "1.18",
        "versionType": "custom"
      }
    ]
  }
]