Description
It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | openshift | openshift 4.8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenShift 4 | afterburn +1 | 5.0.0-1.rhaos4.8.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | atomic-openshift-service-idler | 4.8.0-202106281541.p0.git.39cfc66.assembly.stream.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | butane | 0.12.1-1.rhaos4.8.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | console-login-helper-messages +2 | 0.20.3-1.rhaos4.8.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | coreos-installer +1 | 0.9.0-6.rhaos4.8.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | cri-o | 1.21.2-5.rhaos4.8.gitb27d974.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | cri-tools | 1.21.0-2.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | haproxy | 2.2.13-1.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | ignition +1 | 2.9.0-6.rhaos4.8.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | ironic-images +3 | 2021.1-20210614.1.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | jenkins | 2.289.1.1624020353-1.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | jenkins-2-plugins | 4.8.1624022417-1.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | kata-containers | 2.1.0-4.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openshift +1 | 4.8.0-202107161820.p0.git.051ac4f.assembly.stream.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openshift-ansible +1 | 4.8.0-202106281541.p0.git.626f7a3.assembly.stream.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openshift-clients +1 | 4.8.0-202106281541.p0.git.1077b05.assembly.stream.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openshift-kuryr +4 | 4.8.0-202106281541.p0.git.8a4c2d8.assembly.stream.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openstack-ironic +4 | 1:17.0.4-0.20210713221218.a415e7e.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openstack-ironic-inspector +4 | 10.6.1-0.20210406091336.579f59c.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | openvswitch2.15 +3 | 2.15.0-9.el8fdp | RHSA-2021:2437 |
| Red Hat OpenShift 4 | ostree +3 | 2020.7-5.el8_4 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | ovn2.13 +3 | 20.12.0-25.el8fdp | RHSA-2021:2437 |
| Red Hat OpenShift 4 | podman +3 | 3.0.1-6.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-debtcollector +1 | 2.2.0-0.20210324220630.649189d.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-eventlet +1 | 0.25.2-4.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-hardware +2 | 0.27.0-0.20210406121246.756fedb.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-ironic-lib +1 | 4.6.2-0.20210608101214.ca2e4ba.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-ironic-prometheus-exporter +1 | 2.2.1-0.20210325143713.70e39c8.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-jsonschema +1 | 3.2.0-5.el8ost | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-keystoneauth1 +1 | 4.3.0-0.20210325001456.6a66271.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-kubernetes +2 | 12.0.1-1.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-openshift +1 | 1:0.12.1-1.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-openstacksdk +2 | 0.53.0-0.20210325011601.4629245.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-concurrency +3 | 4.4.0-0.20210325004915.7dcf9e9.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-config +1 | 2:8.5.0-0.20210325050501.cfa2564.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-context +1 | 3.2.0-0.20210325043103.0d02866.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-db +3 | 8.5.0-0.20210325041241.503db60.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-i18n +2 | 5.0.1-0.20210324221600.73187bd.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-log +3 | 4.4.0-0.20210409081224.9b29c90.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-policy +2 | 3.7.0-0.20210325051823.d853485.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-serialization +2 | 4.1.0-0.20210325012242.8445e61.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-service +2 | 2.5.0-0.20210325014731.d25e454.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-upgradecheck +1 | 1.3.0-0.20210325003851.9f95a6e.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-oslo-utils +3 | 4.8.0-0.20210325043201.3288539.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-pyrsistent +1 | 0.16.0-3.el8ost | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-stevedore +1 | 3.3.0-0.20210325001012.7d7154f.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-sushy +2 | 3.7.1-0.20210428165244.bc49878.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-sushy-oem-idrac +2 | 2.0.1-0.20210326152858.83b7eb0.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python-tooz +1 | 2.8.0-0.20210324235001.54448e9.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | python3-ironic-python-agent +1 | 7.0.2-0.20210611153100.bfa97cb.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | redhat-release-coreos | 48.84-4.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | rteval-loads | 1.4-12.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | runc | 1.0.0-98.rhaos4.8.gitcd80260.el7 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | stress-ng | 0.12.06-1.el8 | RHSA-2021:2437 |
| Red Hat OpenShift 4 | toolbox | 0.0.8-3.rhaos4.8.el8 | RHSA-2021:2437 |
Advisories 1
- RHSA-2021:2437 Red Hat Security Advisory: OpenShift Container Platform 4.8.2 packages and security update Red Hat Security Advisories (RHSA) · Oct 9, 2026