CVE-2016-6595

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Summary

CVECVE-2016-6595
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-01-04 20:59:00 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.0 6.5 MEDIUM from [email protected]

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.006490000 probability, percentile 0.709060000 (date 2026-05-11)

Problem Types: CWE-399 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary6.5MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary4AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:S/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Docker Docker 1.12.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
oss-security - Re: cve request: docker swarmkit Dos occurs by repeatly joining and quitting swam cluster as a node af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Third Party Advisory
Docker Unspecified Flaw Lets Remote Authenticated Users Deny Service on the Target Swarm Cluster - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
oss-security - Re: cve request: docker swarmkit Dos occurs by repeatly joining and quitting swam cluster as a node af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Third Party Advisory
oss-security - Re: Re: cve request: docker swarmkit Dos occurs by repeatly joining and quitting swam cluster as a node af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Third Party Advisory
Docker Swarmkit Local Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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