[RHSA-2017:0123-01] Moderate: docker-latest security, bug fix, and enhancement update

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Red Hat Security Advisory

 

Synopsis: Moderate: docker-latest security, bug fix, and enhancement update

Advisory ID: RHSA-2017:0123-01

Product: Red Hat Enterprise Linux Extras

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0123.html

Issue date: 2017-01-17

CVE Names: CVE-2016-9962

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1. Summary:

 

An update for docker-latest 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 - x86_64

 

3. Description:

 

Docker is an open-source engine that automates the deployment of any

application as a lightweight, portable, and self-sufficient container that

will run virtually anywhere.

 

The following packages have been upgraded to a newer upstream version:

docker-latest (1.12.5). (BZ#1404309)

 

Security Fix(es):

 

* The runc component used by `docker exec` feature of docker allowed

additional container processes via to be ptraced by the pid 1 of the

container. This allows the main processes of the container, if running as

root, to gain low-level access to these new processes during

initialization. An attacker can, depending on the nature of the incoming

process, leverage this to elevate access to the host. This ranges from

accessing host content through the file descriptors of the incoming process

to, potentially, a complete container escape by leveraging memory access or

syscall interception. (CVE-2016-9962)

 

Red Hat would like to thank the Docker project for reporting this issue.

Upstream acknowledges Aleksa Sarai (SUSE) and Tonis Tiigi (Docker) as the

original reporters.

 

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/):

 

1402086 - Can't open '/path/to/dir': No such file or directory; volume still in use

1404309 - [extras-rhel-7.3.2] rebase docker-latest to v1.12.4 + projectatomic patches

1406500 - fork/exec .../docker-runc: no such file or directory

1409531 - CVE-2016-9962 docker: insecure opening of file-descriptor allows privilege escalation

 

6. Package List:

 

Red Hat Enterprise Linux 7 Extras:

 

Source:

docker-latest-1.12.5-14.el7.src.rpm

 

x86_64:

docker-client-latest-1.12.5-14.el7.x86_64.rpm

docker-latest-1.12.5-14.el7.x86_64.rpm

docker-latest-logrotate-1.12.5-14.el7.x86_64.rpm

docker-latest-v1.10-migrator-1.12.5-14.el7.x86_64.rpm

 

Red Hat Enterprise Linux 7 Extras:

 

Source:

docker-latest-1.12.5-14.el7.src.rpm

 

x86_64:

docker-client-latest-1.12.5-14.el7.x86_64.rpm

docker-latest-1.12.5-14.el7.x86_64.rpm

docker-latest-logrotate-1.12.5-14.el7.x86_64.rpm

docker-latest-v1.10-migrator-1.12.5-14.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-2016-9962

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

https://access.redhat.com/security/vulnerabilities/cve-2016-9962

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2017 Red Hat, Inc.

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