RHSA-2016:2634 - Security Advisory

Topic

An update for docker is now available for Red Hat Enterprise Linux 7 Extras.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Docker is an open-source engine that automates the deployment of any application as a lightweight, portable, self-sufficient container that will run virtually anywhere.

Security Fix(es):

• 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. (CVE-2016-3697)

This issue was discovered by Mrunal Patel (Red Hat).

Bug Fix(es):

• This update also provides various bug fixes and enhancements. Users are advised to upgrade to these updated packages.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64

Fixes

• BZ - 1303123 - docker requires an updated selinux-policy-targeted for interfaces it uses to be mainstream
• BZ - 1329450 - CVE-2016-3697 docker: privilege escalation via confusion of usernames and UIDs
• BZ - 1330141 - openonload applications fail inside containers
• BZ - 1335951 - heavy logging leads to Docker daemon OOM-ing
• BZ - 1336857 - SELinux context not set properly when building vagrant box
• BZ - 1346185 - Installing Extras 7.2 on RHEL 7.3 nightly causes wrong SELinux domain for the docker daemon and containers
• BZ - 1357121 - [extras-rhel-7.3.0] Docker ps -a shows dead pods that can't be removed
• BZ - 1358819 - docker is prevented from running container by selinux
• BZ - 1362611 - Cannot start container. oci-register-machine failed, permission denied
• BZ - 1370935 - docker-selinux broken in 7.3
• BZ - 1374265 - [extras-rhel-7.3.0] docker-py 1.7.2 hangs when trying to access ctr stats against docker 1.10
• BZ - 1385641 - sssd process are running in docker_t context instead of spc_t context

CVEs

• CVE-2016-3697

References

• https://access.redhat.com/security/updates/classification/#moderate