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AUSCERT External Security Bulletin Redistribution
Cisco Cloud Services Platform 2100 Unauthorized Access Vulnerability
19 October 2017
AusCERT Security Bulletin Summary
Product: Cisco Cloud Services Platform 2100
Publisher: Cisco Systems
Operating System: Virtualisation
Impact/Access: Unauthorised Access -- Existing Account
CVE Names: CVE-2017-12251
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Cisco Security Advisory
Cisco Cloud Services Platform 2100 Unauthorized Access Vulnerability
Advisory ID: cisco-sa-20171018-ccs
First Published: 2017 October 18 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
Base 9.9 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
A vulnerability in the web console of the Cisco Cloud Services Platform (CSP)
2100 could allow an authenticated, remote attacker to interact maliciously
with the services or virtual machines (VMs) operating remotely on an affected
The vulnerability is due to weaknesses in the generation of certain
authentication mechanisms in the URL of the web console. An attacker could
exploit this vulnerability by browsing to one of the hosted VMs' URLs in Cisco
CSP and viewing specific patterns that control the web application's
mechanisms for authentication control. An exploit could allow the attacker to
access a specific VM on the CSP, which causes a complete loss of the system's
confidentiality, integrity, and availability.
Cisco has released software updates that address this vulnerability. There are
no workarounds that address this vulnerability.
This advisory is available at the following link:
This vulnerability affects Cisco Cloud Services Platform (CSP) 2100 running
software release 2.1.0, 2.1.1, 2.1.2, 2.2.0, 2.2.1, or 2.2.2.
To determine which software release of Cisco CSP 2100 is running,
administrators can issue the show version command in user EXEC command mode in
the CLI. The following is an example of the text that the CLI may return:
csp# show version
Cisco Cloud Services Platform Software, 2100 Software (CSP-2100), Version
TAC support: http://www.cisco.com/tac
Copyright (c) 2015 by Cisco Systems, Inc.
Compiled Wednesday 10-February-2016 14:48
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
There are no workarounds that address this vulnerability.
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 upgrade
In all cases, customers should ensure that the devices to be upgraded 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 upgrade.
This vulnerability is fixed in Cisco Cloud Services Platform Release 2.2.3 or
later. The software can be downloaded from the Software Center on Cisco.com by
navigating to Downloads Home > Products > Switches > Virtual Networking >
Cloud Services Platform 2100.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described
in this advisory.
This vulnerability was reported to Cisco by Chris Day, Senior Security
Consultant, MWR InfoSecurity.
Version Description Section Status Date
1.0 Initial public release. Final 2017-October-18
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.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
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