CVE-2021-3344

A privilege escalation flaw was found in OpenShift builder. During build time, credentials outside the build context are automatically mounted into the container image under construction. An OpenShift user, able to execute code during build time inside this container can re-use the credentials to overwrite arbitrary container images in internal registries and/or escalate their privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Mitigation

The affected build strategies include docker, source and custom builds, hence these can be disabled as per the documentation[1]. This does however, exclude the Jenkins build strategy as it is not affected and does not have to be disabled.

[1] <https://docs.openshift.com/container-platform/4.6/builds/securing-builds-by-strategy.html&gt;

On clusters where builds are allowed only grant permissions to perform builds to users who you wish to be to able to view, modify and edit all cluster resources.