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Red Hat 7: RHSA-2019-0303-01 Critical runc Escape Issue

red hat
Calendar Grey February 11, 2019
Scroller Redhat
A significant patch for runc in Red Hat Enterprise Linux 7 Extras fixes a serious security vulnerability.
An update for runc is now available for Red Hat Enterprise Linux 7 Extras

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

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat critical runc container escape

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

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/


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat critical runc container escape

Relevant Releases Architectures

Red Hat Enterprise Linux 7 Extras - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

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

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