Vulnerability-Lookup

CVE-2020-8559 (GCVE-0-2020-8559)

Vulnerability from cvelistv5 – Published: 2020-07-22 13:47 – Updated: 2024-09-16 17:58

Title

Privilege escalation from compromised node to cluster

Summary

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.

Severity

6.4 (Medium)


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

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

kubernetes mitre root

References

3 references

URL	Tags
https://groups.google.com/d/msg/kubernetes-securi…	x_refsource_MISC
https://github.com/kubernetes/kubernetes/issues/92914	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020081…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
Kubernetes	Kubernetes	Affected: 1.6 Affected: 1.7 Affected: 1.8 Affected: 1.9 Affected: 1.10 Affected: 1.11 Affected: 1.12 Affected: 1.13 Affected: 1.14 Affected: 1.15 Affected: 1.16 , ≤ 1.16.12 (custom) Affected: 1.17 , ≤ 1.17.8 (custom) Affected: 1.18 , ≤ 1.18.5 (custom)	guessed

Date Public

2020-07-15 00:00

Credits

Wouter ter Maat of Offensi

Show details on NVD website

JSON

To clipboard

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}

RHSA-2020:4298

Vulnerability from csaf_redhat - Published: 2020-10-27 16:22 - Updated: 2026-09-16 23:31

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.6.1 image security update

Severity

Moderate

Scope

21 vulnerabilities in this advisory, including CVE-2020-8559.

CVE-2020-8559

A flaw was found in the Kubernetes API server, where it allows an attacker to escalate their privileges from a compromised node. This flaw allows an attacker who can intercept requests on a compromised node, to redirect those requests, along with their credentials, to perform actions on other endpoints that trust those credentials (including other clusters), allowing for escalation of privileges. The highest threat from this vulnerability is to confidentiality, integrity, and system availability.

6.4 (Medium)


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

Fixed: 3 products Known not affected: 246 products

https://access.redhat.com/errata/RHSA-2020:4298

Open the full advisory

RHSA-2020:5194

Vulnerability from csaf_redhat - Published: 2020-12-01 10:48 - Updated: 2026-02-23 21:07

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.5.21 bug fix and security update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-8559.

CVE-2020-8559

6.4 (Medium)


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

Fixed: 3 products Known not affected: 40 products

https://access.redhat.com/errata/RHSA-2020:5194

Open the full advisory

RHSA-2020:5363

Vulnerability from csaf_redhat - Published: 2020-12-16 12:36 - Updated: 2026-02-23 21:07

Summary

Red Hat Security Advisory: OpenShift Container Platform 3.11.346 security and bug fix update

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2020-8559.

CVE-2020-8559

6.4 (Medium)


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

Fixed: 24 products Known not affected: 54 products

https://access.redhat.com/errata/RHSA-2020:5363

Open the full advisory

RHSA-2021:0030

Vulnerability from csaf_redhat - Published: 2021-01-13 17:27 - Updated: 2026-02-23 21:07

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.4.32 packages and security update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2020-8559.

CVE-2020-8559

6.4 (Medium)


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

Fixed: 6 products

https://access.redhat.com/errata/RHSA-2021:0030

Open the full advisory

RHSA-2021:0281

Vulnerability from csaf_redhat - Published: 2021-02-03 10:10 - Updated: 2026-03-21 05:04

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.4.33 bug fix and security update

Severity

Important

Scope

3 vulnerabilities in this advisory, including CVE-2020-8559.

CVE-2020-8559

6.4 (Medium)


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

Fixed: 3 products Known not affected: 230 products

https://access.redhat.com/errata/RHSA-2021:0281

Open the full advisory

UBUNTU-CVE-2020-8559 (CVE-2020-8559)

Vulnerability from osv_ubuntu – Published: 2020-07-22 14:15 – Updated: 2025-07-14 04:38 – Source website

Withdrawn 2025-08-28

Details

Severity

6.4 (Medium)


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

6.8 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2020-8559	REPORT
	https://www.openwall.com/lists/oss-security/2020/…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2020-8559	REPORT

JSON

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{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "kubernetes",
        "purl": "pkg:deb/ubuntu/kubernetes@1.0?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "kubernetes",
        "purl": "pkg:deb/ubuntu/kubernetes@1.0?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0"
      ]
    },
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "kubernetes",
        "purl": "pkg:deb/ubuntu/kubernetes@1.0?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2020-8559",
  "modified": "2025-07-14T04:38:59Z",
  "published": "2020-07-22T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-8559"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2020/07/15/6"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-8559"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-8559"
  ],
  "withdrawn": "2025-08-28T16:59:42Z"
}

WID-SEC-W-2022-0510

Vulnerability from csaf_certbund - Published: 2022-06-29 22:00 - Updated: 2026-05-18 22:00

Summary

IBM DB2: Mehrere Schwachstellen

Severity

Hoch

Scope

62 vulnerabilities in this advisory, including CVE-2020-8559.

CVE-2020-8559

Known affected: 4 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2020-8559 (GCVE-0-2020-8559)

RHSA-2020:4298

RHSA-2020:5194

RHSA-2020:5363

RHSA-2021:0030

RHSA-2021:0281

UBUNTU-CVE-2020-8559 (CVE-2020-8559)

WID-SEC-W-2022-0510

Tags

Sightings

Nomenclature

Related by attack behaviour