CVE-2024-23653

A vulnerability was found in the Moby Builder Toolkit, specifically in the Interactive Containers API, where entitlement checks are not adequately validated, caused by a missing privilege check in a GRPC endpoint when called using a custom syntax format. This flaw allows the currently running privileged container to leverage its elevated privileges, such as full Linux capabilities, to break out of the container and achieve complete host root command execution. This issue may lead to container escape to the underlying host OS when building an image using a malicious Dockerfile or upstream image (for example, when using FROM).

Mitigation

Do not use BuildKit frontends from untrusted sources.