CVE-2021-25736

Publication date 30 October 2023

Last updated 4 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.3 · Medium

Score breakdown

Description

Kube-proxy on Windows can unintentionally forward traffic to local processes listening on the same port (“spec.ports[*].port”) as a LoadBalancer Service when the LoadBalancer controller does not set the “status.loadBalancer.ingress[].ip” field. Clusters where the LoadBalancer controller sets the “status.loadBalancer.ingress[].ip” field are unaffected.

Read the notes from the security team

Status

Package Ubuntu Release Status
kubernetes 21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

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 6.3 · Medium

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

References

Other references

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