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Red Hat Security Advisory

Synopsis: Important: runc security update
Advisory ID: RHSA-2019:0303-01
Product: Red Hat Enterprise Linux Extras
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0303
Issue date: 2019-02-11
CVE Names: CVE-2019-5736
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1. Summary:

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

Red Hat Product Security has rated this update as having a security impact
of Important. 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 – aarch64, ppc64le, s390x, x86_64

3. Description:

The runC tool is a lightweight, portable implementation of the Open
Container Format (OCF) that provides container runtime.

Security Fix(es):

* A flaw was found in the way runc handled system file descriptors when
running containers. A malicious container could use this flaw to overwrite
contents of the runc binary and consequently run arbitrary commands on the
container host system. (CVE-2019-5736)

Additional details about this flaw, including mitigation information, can
be found in the vulnerability article linked from the Reference section.

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

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/):

1664908 – CVE-2019-5736 runc: Execution of malicious containers allows for container escape and access to host filesystem

6. Package List:

Red Hat Enterprise Linux 7 Extras:

Source:
runc-1.0.0-59.dev.git2abd837.el7.src.rpm

aarch64:
runc-1.0.0-59.dev.git2abd837.el7.aarch64.rpm
runc-debuginfo-1.0.0-59.dev.git2abd837.el7.aarch64.rpm

ppc64le:
runc-1.0.0-59.dev.git2abd837.el7.ppc64le.rpm
runc-debuginfo-1.0.0-59.dev.git2abd837.el7.ppc64le.rpm

s390x:
runc-1.0.0-59.dev.git2abd837.el7.s390x.rpm
runc-debuginfo-1.0.0-59.dev.git2abd837.el7.s390x.rpm

x86_64:
runc-1.0.0-59.dev.git2abd837.el7.x86_64.rpm
runc-debuginfo-1.0.0-59.dev.git2abd837.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-2019-5736
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/runcescape

8. Contact:

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

Copyright 2019 Red Hat, Inc.
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