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Red Hat Security Advisory
Synopsis: Moderate: docker security and bug fix update
Advisory ID: RHSA-2018:2482-01
Product: Red Hat Enterprise Linux Extras
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2482
Issue date: 2018-08-16
CVE Names: CVE-2018-10892
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1. Summary:
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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux 7 Extras – ppc64le, s390x, x86_64
3. Description:
Docker is an open-source engine that automates the deployment of any
application as a lightweight, portable, self-sufficient container that runs
virtually anywhere.
Security Fix(es):
* docker: container breakout without selinux in enforcing mode
(CVE-2018-10892)
For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.
This issue was discovered by Antonio Murdaca (Red Hat).
Bug Fix(es):
* Previously, the `dontaudit` and `allow` SELinux rules were missing, so
the kernel raised a SELinux AVC message. Consequently, some commands did
not work as expected. This update adds the missing rules, and the commands
now run successfully. (BZ#1550967)
* Previously, during a restart the container daemon did not restore the
state of a container correctly if an exec’ed process was associated with
the container. Consequently, the container daemon aborted with ‘panic:
close of nil channel’ when the daemon was handling the termination of the
exec’ed process. This bug has been fixed, and the container daemon no
longer panics in the aforementioned scenario. (BZ#1554121)
* Previously, bind mounts were resolved before using them inside a
container. Consequently, symlinks could not be mounted inside of the
container. With this update, the source of a bind mount is not resolved. As
a result, it is possible to bind mount symlinks again into a container.
(BZ#1603201)
4. 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
5. Bugs fixed (https://bugzilla.redhat.com/):
1550967 – Running systemd in container causes AVC denials about mounton /proc and write core_pattern
1598581 – CVE-2018-10892 docker: container breakout without selinux in enforcing mode
1603201 – [Regression] docker can’t bindmount symbolic links to namespaces (/proc/PID/ns/*)
6. Package List:
Red Hat Enterprise Linux 7 Extras:
Source:
docker-1.13.1-74.git6e3bb8e.el7.src.rpm
ppc64le:
docker-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-client-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-common-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-debuginfo-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-logrotate-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-lvm-plugin-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-novolume-plugin-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-rhel-push-plugin-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
docker-v1.10-migrator-1.13.1-74.git6e3bb8e.el7.ppc64le.rpm
s390x:
docker-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-client-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-common-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-debuginfo-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-logrotate-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-lvm-plugin-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-novolume-plugin-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-rhel-push-plugin-1.13.1-74.git6e3bb8e.el7.s390x.rpm
docker-v1.10-migrator-1.13.1-74.git6e3bb8e.el7.s390x.rpm
x86_64:
docker-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-client-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-common-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-debuginfo-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-logrotate-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-lvm-plugin-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-novolume-plugin-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-rhel-push-plugin-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
docker-v1.10-migrator-1.13.1-74.git6e3bb8e.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2018-10892
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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