Vulnerability-Lookup

UBUNTU-CVE-2020-8558 (CVE-2020-8558)

Vulnerability from osv_ubuntu – Published: 2020-07-27 20:15 – Updated: 2025-07-14 04:37 – Source website

Withdrawn 2025-08-28

Details

The Kubelet and kube-proxy components in versions 1.1.0-1.16.10, 1.17.0-1.17.6, and 1.18.0-1.18.3 were found to contain a security issue which allows adjacent hosts to reach TCP and UDP services bound to 127.0.0.1 running on the node or in the node's network namespace. Such a service is generally thought to be reachable only by other processes on the same host, but due to this defeect, could be reachable by other hosts on the same LAN as the node, or by containers running on the same node as the service.

Severity

5.4 (Medium)


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

8.8 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2020-8558	REPORT
	https://www.cve.org/CVERecord?id=CVE-2020-8558	REPORT

JSON

To clipboard

{
  "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 Kubelet and kube-proxy components in versions 1.1.0-1.16.10, 1.17.0-1.17.6, and 1.18.0-1.18.3 were found to contain a security issue which allows adjacent hosts to reach TCP and UDP services bound to 127.0.0.1 running on the node or in the node\u0027s network namespace. Such a service is generally thought to be reachable only by other processes on the same host, but due to this defeect, could be reachable by other hosts on the same LAN as the node, or by containers running on the same node as the service.",
  "id": "UBUNTU-CVE-2020-8558",
  "modified": "2025-07-14T04:37:16Z",
  "published": "2020-07-27T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-8558"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-8558"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-8558"
  ],
  "withdrawn": "2025-08-28T16:59:42Z"
}

CVE-2020-8558 (GCVE-0-2020-8558)

Vulnerability from cvelistv5 – Published: 2020-07-27 19:55 – Updated: 2024-09-16 22:40

Title

Kubernetes node setting allows for neighboring hosts to bypass localhost boundary

Summary

Severity

5.4 (Medium)


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

CWE

CWE-420 - Unprotected Alternate Channel

Assigner

kubernetes mitre root

References

3 references

URL	Tags
https://github.com/kubernetes/kubernetes/issues/92315	x_refsource_CONFIRM
https://groups.google.com/g/kubernetes-announce/c…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2020082…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
Kubernetes	Kubernetes	Affected: prior to 1.18.4 Affected: prior to 1.17.7 Affected: prior to 1.16.11 Affected: 1.15 Affected: 1.14 Affected: 1.13 Affected: 1.12 Affected: 1.11 Affected: 1.10 Affected: 1.9 Affected: 1.8 Affected: 1.7 Affected: 1.6 Affected: 1.5 Affected: 1.4 Affected: 1.3 Affected: 1.2 Affected: 1.1

Date Public

2020-04-18 00:00

Credits

János Kövér, Ericsson Additional impacts reported by Rory McCune, NCC Group and Yuval Avrahami and Ariel Zelivansky, Palo Alto Networks

Show details on NVD website

JSON

To clipboard

{
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              "x_transferred"
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          },
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              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20200821-0001/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "versions": [
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            },
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            {
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        },
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        }
      ],
      "metrics": [
        {
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            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-420",
              "description": "CWE-420 Unprotected Alternate Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-08-21T09:06:15.000Z",
        "orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
        "shortName": "kubernetes"
      },
      "references": [
        {
          "tags": [
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        },
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    "dateReserved": "2020-02-03T00:00:00.000Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.