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Fencer Vulns
medium 4.7

CVE-2020-8563 json

Secret leaks in logs for vSphere Provider kube-controller-manager

published 2020-12-07 5 y ago modified 2026-06-17 4 mo ago also GHSA-5xfg-wv98-264m , GO-2024-2755 , EUVD-2024-1110

cvss
4.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

In Kubernetes clusters using VSphere as a cloud provider, with a logging level set to 4 or above, VSphere cloud credentials will be leaked in the cloud controller manager's log. This affects < v1.19.3.

Patch / fix

  • go github.com/kubernetes/kubernetes 1.19.3
  • go k8s.io/kubernetes 1.19.3
  • kubernetes kubernetes 1.19.3
  • openshift openshift 4.6 4.6.0-202012051246.p0.git.94231.efc9027.el7
  • openshift openshift 4.6 4.6.0-202012051246.p0.git.94231.efc9027.el8
  • openshift-hyperkube openshift 4.6 4.6.0-202012051246.p0.git.94231.efc9027.el7
  • openshift-hyperkube openshift 4.6 4.6.0-202012051246.p0.git.94231.efc9027.el8

red hat advisories RHSA-2020:5260

  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250807T150727-1.1

opensuse advisories openSUSE-SU-2025:15424-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8563 updated cvss 6.3

kubernetes: Secret leaks in kube-controller-manager when using vSphere Provider

  • Red Hat OpenShift Container Platform 4.6 openshift 4.6.0-202012051246.p0.git.94231.efc9027.el7, openshift 4.6.0-202012051246.p0.git.94231.efc9027.el8, openshift-hyperkube 4.6.0-202012051246.p0.git.94231.efc9027.el7, openshift-hyperkube 4.6.0-202012051246.p0.git.94231.efc9027.el8
    fixed: vendor fix RHSA-2020:5260
  • Red Hat OpenShift Container Platform 4.7 openshift4/ose-hyperkube v4.7.0-202102130115.p0
    fixed: vendor fix RHSA-2020:5633
  • Red Hat OpenShift Container Platform 3.11 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +7 more Red Hat OpenShift Container Platform 4.6 python-eventlet 0.25.2-3.el8ost, python-pyroute2 0.5.13-1.el8ost, python3-eventlet 0.25.2-3.el8ost, python3-pyroute2 0.5.13-1.el8ost, ironic-images 15.1-20201201.1.el8, ironic-images-all 15.1-20201201.1.el8, +14 more Red Hat OpenShift Container Platform 4.7 openshift4/ose-cli v4.7.0-202102130115.p0, openshift4/ose-pod v4.7.0-202102130115.p0, openshift4/ose-etcd v4.7.0-202102130115.p0, openshift4/ose-tests v4.7.0-202102181036.p0, openshift4/ose-console v4.7.0-202102130115.p0, openshift4/ose-coredns v4.7.0-202102130115.p0, +129 more Red Hat Storage 3 heketi, heketi-client, python-heketi
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.1 6.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
go github.com/kubernetes/kubernetes
<1.19.3
1.19.3
go k8s.io/kubernetes
<1.19.3
1.19.3

Affected products

  • Kubernetes Kubernetes

Classification

Weakness
  • CWE-532 Insertion of Sensitive Information into Log File
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.