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Cisco Wireless Control System Conversion Utility Adds Default Password



Cisco Security Advisory: Cisco Wireless Control System Conversion Utility Adds Default Password
Cisco Security Advisory: Cisco Wireless Control System Conversion Utility Adds Default Password



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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-20071010-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-20071010-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/intelligence/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/cvss. 

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-alert@cisco.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: tac@cisco.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-20071010-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-announce@cisco.com 
* first-teams@first.org 
* bugtraq@securityfocus.com 
* vulnwatch@vulnwatch.org 
* cisco@spot.colorado.edu 
* cisco-nsp@puck.nether.net 
* full-disclosure@lists.grok.org.uk 
* comp.dcom.sys.cisco@newsgate.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/products/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/go/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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