CVE-2016-9962

RunC permitió procesos de contenedores adicionales a través de 'runc exec' para ser ptraced por el pid 1 del contenedor. Esto permite a los principales procesos del contenedor, si se ejecutan como root, obtener acceso a los descriptores de archivo de estos nuevos procesos durante la inicialización y puede conducir a escapes de contenedores o modificación del estado de runC antes de que el proceso sea totalmente ubicado dentro del contenedor.

The runc component used by `docker exec` feature of docker allowed additional container processes to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain low-level access to these new processes during initialization. An attacker can, depending on the nature of the incoming process, leverage this to elevate access to the host. This ranges from accessing host content through the file descriptors of the incoming process to, potentially, a complete container escape by leveraging memory access or syscall interception.

Docker is an open-source engine that automates the deployment of any application as a lightweight, portable, and self-sufficient container that will run virtually anywhere. The following packages have been upgraded to a newer upstream version: docker-latest. Security Fix: The runc component used by `docker exec` feature of docker allowed additional container processes via to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain low-level access to these new processes during initialization. An attacker can, depending on the nature of the incoming process, leverage this to elevate access to the host. This ranges from accessing host content through the file descriptors of the incoming process to, potentially, a complete container escape by leveraging memory access or syscall interception.