Red Hat OpenShift: Schwachstelle ermöglicht Denial of Service
WID-SEC-2023-0156 · first 09.09.2021 · updated 19.10.2026 · CVSS 7,5
What it is about
Red Hat OpenShift ist eine "Platform as a Service" (PaaS) Lösung zur Bereitstellung von Applikationen in der Cloud. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat OpenShift ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- Ubuntu Linux
- Red Hat OpenShift Container Platform <4.6
- SUSE openSUSE
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Red Hat OpenShift Container Platform 4.6
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Red Hat Security Advisory RHSA-2021:4162 vom 2021-11-10 access.redhat.com
- Red Hat Security Advisory vom 2021-09-08 access.redhat.com
- Red Hat Security Advisory vom 2021-09-08 access.redhat.com
- Red Hat Security Advisory RHSA-2021:4702 vom 2021-11-16 access.redhat.com
- Ubuntu Security Notice USN-5812-1 vom 2023-01-19 ubuntu.com
- openSUSE Security Update OPENSUSE-SU-2026:12045-1 vom 2026-10-16 lists.opensuse.org
- openSUSE Security Update OPENSUSE-SU-2026:12044-1 vom 2026-10-16 lists.opensuse.org
CVE: CVE-2021-33503
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.