CVE-2016-3697 – docker: privilege escalation via confusion of usernames and UIDs

https://notcve.org/view.php?id=CVE-2016-3697

libcontainer/user/user.go in runC before 0.1.0, as used in Docker before 1.11.2, improperly treats a numeric UID as a potential username, which allows local users to gain privileges via a numeric username in the password file in a container. libcontainer/user/user.go en runC en versiones anteriores a 0.1.0, tal como se utiliza en Docker en versiones anteriores a 1.11.2, trata indebidamente un UID numérico como un nombre de usuario potencial, lo que permite a usuarios locales obtener privilegios a través de un nombre de usuario numérico en el archivo password en un contenedor. It was found that Docker would launch containers under the specified UID instead of a username. An attacker able to launch a container could use this flaw to escalate their privileges to root within the launched container. • http://lists.opensuse.org/opensuse-updates/2016-05/msg00111.html http://rhn.redhat.com/errata/RHSA-2016-1034.html http://rhn.redhat.com/errata/RHSA-2016-2634.html https://github.com/docker/docker/issues/21436 https://github.com/opencontainers/runc/commit/69af385de62ea68e2e608335cffbb0f4aa3db091 https://github.com/opencontainers/runc/pull/708 https://github.com/opencontainers/runc/releases/tag/v0.1.0 https://security.gentoo.org/glsa/201612-28 https://access.redhat.com/security/cve/CVE- • CWE-264: Permissions, Privileges, and Access Controls •