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Cisco Security Advisory:
Cisco Wireless Control System Conversion Utility Adds
Default Password
Advisory ID: cisco-sa-20071010-wcs
http://www.cisco.com/warp/public/707/cisco-sa-20
071010-wcs.shtml
Revision 1.0
For Public Release 2007 October 10 1600 UTC (GMT)
-
------------------------------------------------------------
-------------------
Summary
=======
Customers who use the CiscoWorks Wireless LAN Solution
Engine (WLSE) may use a
conversion utility to convert over to a Cisco Wireless
Control System (WCS).
This conversion utility creates and uses administrative
accounts with default
credentials. Because there is no requirement to change these
credentials during
the conversion process, an attacker may be able to leverage
the accounts that
have default credentials to take full administrative control
of the WCS after
the conversion has been completed.
Customers who have converted their CiscoWorks WLSE to a
Cisco WCS are advised
to set strong passwords for all accounts on their Cisco
WCS.
This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-2
0071010-wcs.shtml.
Affected Products
=================
Vulnerable Products
+------------------
Cisco WCS systems that have been converted from a CiscoWorks
WLSE using the
conversion utility for version 4.1.91.0 or earlier are
vulnerable.
Products Confirmed Not Vulnerable
+--------------------------------
Cisco WCS systems that have not been converted from a
CiscoWorks WLSE using the
conversion utility are not affected by this problem.
Additionally, Cisco WCS
systems that have been converted from a CiscoWorks WLSE
using the conversion
utility for version 4.2 or later are not vulnerable.
For more information about Cisco Unified Wireless Network
Software Release 4.2,
visit:
http://www.cisco.com/en/US/products
/ps6973/prod_bulletin0900aecd806b7f8a.html
No other Cisco products are currently known to be affected
by this
vulnerability.
Details
=======
CiscoWorks WLSE is a centralized, systems-level application
for managing and
controlling an entire autonomous Cisco wireless LAN (WLAN)
infrastructure. The
Cisco Wireless Control System (WCS) is a centralized,
systems-level application
for managing and controlling lightweight access points and
wireless LAN
controllers for the Cisco Unified Wireless Network.
A CiscoWorks WLSE can be converted to a Cisco WCS using a
utility that can be
ordered from Cisco. There are two administrative accounts on
the Wireless
Control System (WCS): a Linux root account and Cisco WCS
root account.
Vulnerable versions of the conversion utility do not force
the administrator to
change the password for the Linux "root" user of
the newly converted system.
Non-vulnerable versions of the conversion utility force the
administrator to
change both account passwords.
More information about the conversion utility is available
in the Conversion of
a WLSE Autonomous Deployment to a WCS Controller Deployment
appendix in the
Cisco Wireless Control System Configuration Guide.
Vulnerability Scoring Details
=============================
Cisco is providing scores for the vulnerabilities in this
advisory based on the
Common Vulnerability Scoring System (CVSS). The CVSS scoring
in this Security
Advisory is done in accordance with CVSS version 2.0.
Cisco will provide a base and temporal score. Customers can
then compute
environmental scores to assist in determining the impact of
the vulnerability
in individual networks.
Cisco PSIRT will set the bias in all cases to normal.
Customers are encouraged
to apply the bias parameter when determining the
environmental impact of a
particular vulnerability.
Cisco has provided a FAQ to answer additional questions
regarding CVSS at
http://www.cisco.com/web/about/security/in
telligence/cvss-qandas.html.
Cisco has also provided a CVSS calculator to help compute
the environmental
impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/c
vss.
CSCsj71081 - Need to have installer on WLSE-WCS conversion
procedures
CVSS Base Score - 10.0
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - Complete
Integrity Impact - Complete
Availability Impact - Complete
CVSS Temporal Score - 8.3
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of the vulnerability may result in
full administrative
control of the Cisco WCS system or user-level access to the
host Linux
operating system.
Software Versions and Fixes
===========================
When considering software upgrades, also consult http://www.cisco.com/go
/psirt
and any subsequent advisories to determine exposure and a
complete upgrade
solution.
In all cases, customers should exercise caution to be
certain the devices to be
upgraded contain sufficient memory and that current hardware
and software
configurations will continue to be supported properly by the
new release. If
the information is not clear, contact the Cisco Technical
Assistance Center
("TAC") or your contracted maintenance provider
for assistance.
Workarounds
===========
The vulnerability described in this document can be
eliminated by logging in to
the affected WCS and changing the default password for the
administrative Linux
root account to a strong password chosen by the user.
Refer to the Managing User Accounts chapter of the Cisco
Wireless Control
System Configuration Guide for more information about
changing administrative
accounts.
Obtaining Fixed Software
========================
Cisco will make free software available to address this
vulnerability for
affected customers. This advisory will be updated as fixed
software becomes
available. Prior to deploying software, customers should
consult their
maintenance provider or check the software for feature set
compatibility and
known issues specific to their environment.
Customers may only install and expect support for the
feature sets they have
purchased. By installing, downloading, accessing or
otherwise using such
software upgrades, customers agree to be bound by the terms
of Cisco's software
license terms found at http://www.cisco.com/public/sw-license-agreement.html,
or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.
Do not contact either "psirt cisco.com" or
"security-alertcisco.com" for
software upgrades.
Because the fix for this vulnerability is a default
configuration change, and a
workaround is available, a software upgrade is not required
to address this
vulnerability. However, if you have a service contract, and
would like to
upgrade to unaffected code, you may obtain upgraded software
through your
regular update channels when that software is available. For
most customers,
this means that upgrades should be obtained through the
Software Center on
Cisco's worldwide web site at http://www.cisco.com.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software
through their regular
update channels. For most customers, this means that
upgrades should be
obtained through the Software Center on Cisco's worldwide
website at
http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained
through prior or
existing agreement with third-party support organizations
such as Cisco
Partners, authorized resellers, or service providers should
contact that
support organization for guidance and assistance with the
appropriate course of
action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on
specific customer
situations such as product mix, network topology, traffic
behavior, and
organizational mission. Due to the variety of affected
products and releases,
customers should consult with their service provider or
support organization to
ensure any applied workaround or fix is the most appropriate
for use in the
intended network before it is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but who do not hold
a Cisco service
contract and customers who purchase through third-party
vendors but are
unsuccessful at obtaining fixed software through their point
of sale should get
their upgrades by contacting the Cisco Technical Assistance
Center (TAC). TAC
contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
* e-mail: taccisco.com
Have your product serial number available and give the URL
of this notice as
evidence of your entitlement to a free upgrade. Free
upgrades for non-contract
customers must be requested through the TAC.
Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC
.shtml for
additional TAC contact information, including special
localized telephone
numbers and instructions and e-mail addresses for use in
various languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or
malicious use of
the vulnerability described in this advisory.
Status of this Notice: FINAL
============================
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 stand-alone copy or Paraphrase of the text of this
document that omits the
distribution URL in the following section is an uncontrolled
copy, and may lack
important information or contain factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20
071010-wcs.shtml
In addition to worldwide web posting, a text version of this
notice is
clear-signed with the Cisco PSIRT PGP key and is posted to
the following e-mail
and Usenet news recipients.
* cust-security-announcecisco.com
* first-teamsfirst.org
* bugtraqsecurityfocus.com
* vulnwatchvulnwatch.org
* ciscospot.colorado.edu
* cisco-nsppuck.nether.net
* full-disclosurelists.grok.org.uk
* comp.dcom.sys.cisconewsgate.cisco.com
Future updates of this advisory, if any, will be placed on
Cisco's worldwide
website, but may or may not be actively announced on mailing
lists or
newsgroups. Users concerned about this problem are
encouraged to check the
above URL for any updates.
Revision History
================
+-----------------------------------------------------------
--+
| Revision 1.0 | 2007-October-10 | Initial public release.
|
+-----------------------------------------------------------
--+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities
in Cisco products,
obtaining assistance with security incidents, and
registering to receive
security information from Cisco, is available on Cisco's
worldwide website at
http://www.cisco.com/en/US/produ
cts/products_security_vulnerability_policy.html.
This includes instructions for press inquiries regarding
Cisco security
notices. All Cisco security advisories are available at
http://www.cisco.com/g
o/psirt.
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All contents are Copyright 2006-2007 Cisco Systems, Inc. All
rights reserved.
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Updated: Oct 10, 2007
Document ID: 98799
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