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CVE-2016-9962

6.4 · MEDIUM

RunC allowed additional container processes via 'runc exec' to be ptraced by the pid 1 of the container.

Published Jan 31, 2017CWE-362EPSS 0.41%

Overview

CVE-2016-9962 is a medium-severity vulnerability. It was published on January 31, 2017 and has a CVSS 3.0 base score of 6.4 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

RunC allowed additional container processes via 'runc exec' to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain access to file-descriptors of these new processes during the initialization and can lead to container escapes or modification of runC state before the process is fully placed inside the container.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refrhn.redhat.com/errata/RHSA-2017-0116.htmlRefrhn.redhat.com/errata/RHSA-2017-0123.htmlRefrhn.redhat.com/errata/RHSA-2017-0127.htmlRefseclists.org/fulldisclosure/2017/Jan/21Refseclists.org/fulldisclosure/2017/Jan/29Refwww.securityfocus.com/archive/1/540001/100/0/threadedRefwww.securityfocus.com/bid/95361Refaccess.redhat.com/security/vulnerabilities/cve-2016-9962Refbugzilla.suse.com/show_bug.cgi?id=1012568#c6GitHubgithub.com/docker/docker/releases/tag/v1.12.6

How CyberStrike helps

Frequently asked questions

What is CVE-2016-9962?

CVE-2016-9962 is a medium-severity vulnerability. It was published on January 31, 2017 and has a CVSS 3.0 base score of 6.4 (MEDIUM).

How severe is CVE-2016-9962?

This vulnerability has a CVSS 3.0 base score of 6.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2016-9962?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-9962?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-9962 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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