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AUSCERT External Security Bulletin Redistribution
Cisco CloudCenter Orchestrator Docker Engine Privilege
22 December 2016
AusCERT Security Bulletin Summary
Product: Cisco CloudCenter Orchestrator
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Remote/Unauthenticated
CVE Names: CVE-2016-9223
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Cisco Security Advisory
Cisco CloudCenter Orchestrator Docker Engine Privilege Escalation
Advisory ID: cisco-sa-20161221-cco
First Published: 2016 December 21 16:00 GMT
Last Updated: 2016 December 21 18:03 GMT
Version 1.1: Final
CVSS Score: Base 9.3, Temporal 8.1
A vulnerability in the Docker Engine configuration of Cisco CloudCenter
Orchestrator (CCO; formerly CliQr) could allow an unauthenticated, remote
attacker to install Docker containers with high privileges on the affected
The vulnerability is due to a misconfiguration that causes the Docker
Engine management port to be reachable outside of the CloudCenter Orchestrator
system. An attacker could exploit this vulnerability by loading Docker
containers on the affected system with arbitrary privileges. As a secondary
impact this may allow the attacker to gain root privileges on the affected
Cisco has released software updates that address this vulnerability.
Workarounds that mitigate this vulnerability are available. This advisory is
available at the following link:
Vulnerable Products This vulnerability affect all releases of Cisco
CloudCenter Orchestrator (CCO) deployments where the Docker Engine TCP port
2375 is open on the system and bound to local address 0.0.0.0 (any interface).
Administrator can log in to the CCO and issue the netstat -ant | grep 2375
command to determine if the port is open and bound to 0.0.0.0 local address.
The following example shows a CCO device with port 2375 in listening state
and on local address 0.0.0.0
[root@cco ~]# netstat -ant | grep 2375 Proto Recv-Q Send-Q Local
Address Foreign Address (state) tcp 0 0 0.0.0.0:2375 0.0.0.0:* LISTEN
TCP port 2375 is open by default with local address 0.0.0.0. Products
Confirmed Not Vulnerable No other Cisco products are currently known to be
affected by this vulnerability.
Indicators of Compromise
Administrator may be able to detect a malicious Docker container by
listing all the install containers on the system using the docker images
command. The following example shows a list of containers which include a
malicious container called badcontainer:
[root@cco ~]#docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL
SIZE badcontainer latest aaaaaaaaaaaa 1 day ago 128.1 MB cliqr/worker latest
8b5213eb3fa2 2 weeks ago 643.9 MB [...]
Because this vulnerability may allow access to the Cisco CCO software with
root privileges, additional indicator of compromise may be present depending
on the goal of the malicious actor.
Administrators can restrict the Docker Engine port to bind to localhost
(127.0.0.1) following the procedure below:
Issue the su command to obtain sudo privileges Enter the system
directory using the following command cd /etc/systemd/system/ Edit the
docker.socket file with your chosen editor and change the ListenStream value
to the following:
Reload with the systemctl daemon-reload && systemctl restart docker
command In addition, administrators can use the cloud provider security group
or external firewall devices in private cloud deployment to restrict access to
the CCO Docker Engine management port as per product documentation:
Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support for
software versions and feature sets for which they have purchased a license. By
installing, downloading, accessing, or otherwise using such software upgrades,
customers agree to follow the terms of the Cisco software license:
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do not
entitle customers to a new software license, additional software feature sets,
or major revision upgrades.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the Cisco
Security Advisories and Alerts page, to determine exposure and a complete
In all cases, customers should ensure that the devices to upgrade contain
sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release. If
the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance providers.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but are
unsuccessful in obtaining fixed software through their point of sale should
obtain upgrades by contacting the Cisco TAC:
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
This vulnerability has been fixed in the Cisco CloudCenter Orchestrator
4.6.2 patch release.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements of the vulnerability that is described in this
The Cisco PSIRT is aware that this vulnerability has been exploited
publicly in a limited number of cases.
This vulnerability was found during the resolution of support cases.
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR
MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE
RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
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