CVE-2016-6595 Denial of service in n/a
Authenticated users can cause denial of service in Docker SwarmKit by repeatedly joining and quitting, exhausting manager memory.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2016-6595?
CVE-2016-6595 is a medium-severity denial of service vulnerability in n/a, published on 4 Jan 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-399
Which versions are affected by CVE-2016-6595?
It affects 1 product.
Products include Docker Docker.
How do I fix CVE-2016-6595?
No fix has been published for CVE-2016-6595 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2016-6595 being exploited?
There is no known exploitation of CVE-2016-6595 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-669g-g3v8-296m.