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CVE-2016-6595

6.5 · MEDIUM

The SwarmKit toolkit 1.12.0 for Docker allows remote authenticated users to cause a denial of service (prevention of cluster joins) via a long sequence of join and quit actions.

Published Jan 4, 2017CWE-399EPSS 2.82%

Overview

CVE-2016-6595 is a medium-severity vulnerability. It was published on January 4, 2017 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The SwarmKit toolkit 1.12.0 for Docker allows remote authenticated users to cause a denial of service (prevention of cluster joins) via a long sequence of join and quit actions. NOTE: the vendor disputes this issue, stating that this sequence is not "removing the state that is left by old nodes. At some point the manager obviously stops being able to accept new nodes, since it runs out of memory. Given that both for Docker swarm and for Docker Swarmkit nodes are *required* to provide a secret token (it's actually the only mode of operation), this means that no adversary can simply join nodes and exhaust manager resources. We can't do anything about a manager running out of memory and not being able to add new legitimate nodes to the system. This is merely a resource provisioning issue, and definitely not a CVE worthy vulnerability.

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

Refwww.openwall.com/lists/oss-security/2016/08/04/1Refwww.openwall.com/lists/oss-security/2016/09/02/1Refwww.openwall.com/lists/oss-security/2016/09/02/8Refwww.securityfocus.com/bid/92195Refwww.securitytracker.com/id/1036548Refwww.openwall.com/lists/oss-security/2016/08/04/1Refwww.openwall.com/lists/oss-security/2016/09/02/1Refwww.openwall.com/lists/oss-security/2016/09/02/8Refwww.securityfocus.com/bid/92195Refwww.securitytracker.com/id/1036548

How CyberStrike helps

Frequently asked questions

What is CVE-2016-6595?

CVE-2016-6595 is a medium-severity vulnerability. It was published on January 4, 2017 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2016-6595?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2016-6595?

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-2016-6595?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-6595 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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