Moby - Access to remapped root allows privilege escalation to real root
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the –userns-remap option in which access to remapped root allows privilege escalation to real root. When using “–userns-remap”, if the root user in the remapped namespace has access to the host filesystem they can modify files under “/var/lib/docker/