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AUSCERT External Security Bulletin Redistribution
Important: runc security update
12 February 2019
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Root Compromise -- Existing Account
CVE Names: CVE-2019-5736
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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
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
The runC tool is a lightweight, portable implementation of the Open
Container Format (OCF) that provides container runtime.
* 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.
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
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:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2019 Red Hat, Inc.
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