CVE-2021-20198 Auth bypass in openshift/installer
Remote attackers can execute arbitrary commands in containers during OpenShift installation due to anonymous authentication on the kubelet port.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20198?
CVE-2021-20198 is a high-severity authentication bypass vulnerability in openshift/installer, published on 23 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in the OpenShift Installer before version v0.9.0-master.0.20210125200451-95101da940b0. During installation of OpenShift Container Platform 4 clusters, bootstrap nodes are provisioned with anonymous authentication enabled on kubelet port 10250. A remote attacker able to reach this port during installation can make unauthenticated `/exec` requests to execute arbitrary commands within running containers. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Weakness: CWE-306
Which versions are affected by CVE-2021-20198?
It affects 1 product.
Products include Redhat Openshift Installer.
How do I fix CVE-2021-20198?
No fix has been published for CVE-2021-20198 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-20198 being exploited?
There is no known exploitation of CVE-2021-20198 in the wild and no public exploit code.