Описание
A flaw was found in OpenShift. This issue occurs due to the misuse of elevated privileges in the OpenShift Container Platform's build process. During the build initialization step, the git-clone container is run with a privileged security context, allowing unrestricted access to the node. An attacker with developer-level access can provide a crafted .gitconfig file containing commands executed during the cloning process, leading to arbitrary command execution on the worker node. An attacker running code in a privileged container could escalate their permissions on the node running the container.
Отчет
In all versions of OpenShift, the "Custom" build strategy gives developers permission to run arbitrary commands in a privileged container. This is disabled by default, and documentation explicitly warns that this should only be enabled for highly trusted users (eg: cluster admins). We therefore do not consider this vulnerability a privilege escalation path for "Custom" strategy builds. Microshift is not affected by this vulnerability. MicroShift does not include this OpenShift API. The Builds for Red Hat OpenShift Operator based on Shipwright is not affected by this vulnerability.
Меры по смягчению последствий
Cluster admins can follow the instructions in "Securing Builds by Strategy" to block use of the "Docker" and “Source” build strategies on a cluster, or restrict the use to a set of highly trusted users, until the cluster is able to be upgraded. https://docs.openshift.com/container-platform/4.16/cicd/builds/securing-builds-by-strategy.html
Дополнительная информация
Статус:
9.9 Critical
CVSS3
Связанные уязвимости
A flaw was found in OpenShift. This issue occurs due to the misuse of elevated privileges in the OpenShift Container Platform's build process. During the build initialization step, the git-clone container is run with a privileged security context, allowing unrestricted access to the node. An attacker with developer-level access can provide a crafted .gitconfig file containing commands executed during the cloning process, leading to arbitrary command execution on the worker node. An attacker running code in a privileged container could escalate their permissions on the node running the container.
OpenShift Controller Manager Improper Privilege Management
Уязвимость корпоративной платформы Red Hat OpenShift Container Platform, связанная с небезопасным управлением привилегиями, позволяющая нарушителю повысить свои привилегии и выполнить произвольные команды
9.9 Critical
CVSS3