---
title: "CVE-2020-8558\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2020-8558?format=md
keywords: index, follow
---

# CVE-2020-8558

Publication date 27 July 2020

Last updated 11 July 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**5.4 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2020-8558?format=md#impact-score)

Toggle side navigation

## Description

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.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2020-8558?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| kubernetes | 25.04 plucky | Not in release |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.10 groovy | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Notes

---

### [leosilva](https://launchpad.net/~leosilva)

kubernates is in fact a kubernetes installer
that calls snap, not the package it self.

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.4 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Adjacent |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | Low |
  | Integrity impact | Low |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.4 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8558)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-8558)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-8558)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-8558)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2020-8558>