Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

           Low: docker security, bug fix, and enhancement update
                               9 March 2015


        AusCERT Security Bulletin Summary

Product:           docker
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
                   Linux variants
Impact/Access:     Increased Privileges      -- Remote/Unauthenticated
                   Overwrite Arbitrary Files -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-9357 CVE-2014-9356 

Original Bulletin: 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Red Hat. It is recommended that administrators
         running docker check for an updated version of the software for 
         their operating system.

- --------------------------BEGIN INCLUDED TEXT--------------------

Hash: SHA1

                   Red Hat Security Advisory

Synopsis:          Low: docker security, bug fix, and enhancement update
Advisory ID:       RHSA-2015:0623-02
Product:           RHEL Extras
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-0623.html
Issue date:        2015-03-05
CVE Names:         CVE-2014-9356 CVE-2014-9357 

1. Summary:

Updated docker packages that fix two security issues, several bugs, and add
various enhancements are now available for Red Hat Enterprise Linux 7

Red Hat Product Security has rated this update as having Low security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux 7 Extras - noarch, x86_64

3. Description:

Docker is a service providing container management on Linux.

It was found that a malicious container image could overwrite arbitrary
portions of the host file system by including absolute symlinks,
potentially leading to privilege escalation. (CVE-2014-9356)

A flaw was found in the way the Docker service unpacked images or builds
after a "docker pull". An attacker could use this flaw to provide a
malicious image or build that, when unpacked, would escalate their
privileges on the system. (CVE-2014-9357)

Red Hat would like to thank Docker Inc. for reporting these issues.

The docker-python subpackage provides the new Atomic tool. The goal of
Atomic is to provide a high level, coherent entry point for Red Hat
Enterprise Linux Atomic Host. Atomic makes it easier to interact with
special kinds of containers, such as super-privileged debugging tools.
Comprehensive information and documentation is available in the atomic
manual pages.

The docker packages have been upgraded to upstream version 1.4.1, which
provides a number of bug fixes and enhancements over the previous version,
most notably an experimental overlayfs storage driver. (BZ#1174351)

Bug fixes:

* The JSON configuration files for containers and images were inconsistent.
As a consequence, when these files were parsed by the "docker inspect"
command, the output was unnecessarily complex. This update improves the key
naming schema in the configuration files and the output from "docker
inspect" is now uniform. (BZ#1092773)

* The /run directory had an incorrect SELinux label. As a consequence,
containers could not access /run. This update corrects the SELinux label
and containers now have access to /run. (BZ#1100009)

* The Docker service contained an incorrect path for the secrets directory.
As a consequence, executing "docker run" failed to create containers. This
update fixes the default path to the secrets directory and "docker run" now
executes successfully. (BZ#1102568)

* It was not possible to specify a default repository in the configuration
file in cases where all docker.io files are inaccessible. As a consequence,
running docker commands failed because they could not contact the default
repositories. Now, it is possible to specify a local Docker repository, and
commands no longer fail because they are able to connect to a local private
repository. (BZ#1106430)

* When executing the "docker attach" command on a container which was in
the process of shutting down, the process did not fail, but became
unresponsive. This bug has been fixed, and running "docker attach" on a
container which is shutting down causes the attach process to fail with an
informative error message that it is not possible to attach to a stopped
container. (BZ#1113608)

* The "docker run" sub-command incorrectly returned non-zero exit codes,
when they all should have been zero. As a consequence, it was not possible
to differentiate between the exit codes of the docker command line and exit
codes of contained processes, which in turn made automated control of
"docker run" impossible. This update fixes the inconsistencies within the
exit codes of "docker run". Additionally, this update also fixes
inconsistencies of other docker sub-commands and improves the language in
the error and warning messages. (BZ#1162807)

* Adding a new registry with the "--registry-prepend" option did not follow
the correct order to query and download an image. As a consequence, it did
not query the prepended new registry first, but rather started with
querying docker.io. The "--registry-prepend" option has been renamed to
"--registry-add" and its behavior has been changed to query the registries
added in the given order, with docker.io queried last. (BZ#1186153)

All docker users are advised to upgrade to these updated packages, which
correct these issues and add these enhancements.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:


5. Bugs fixed (https://bugzilla.redhat.com/):

1092773 - Image and container JSON keys have no consistency
1100009 - /run is broken with SELinux
1102568 - Wrong path of default secrets docker tries to open
1113608 - `docker attach` hangs when attaching container, which is exiting
1162807 - Docker CLI exit codes for errors?
1172761 - CVE-2014-9356 docker: Path traversal during processing of absolute symlinks
1172782 - CVE-2014-9357 docker: Escalation of privileges during decompression of LZMA archives
1174351 - docker 1.4.1 is available

6. Package List:

Red Hat Enterprise Linux 7 Extras:




These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from

7. References:


8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
Version: GnuPG v1


- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
Comment: http://www.auscert.org.au/render.html?it=1967