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TUCoPS :: Cisco :: ciacl090.txt

Cisco 11000 Series Switch Web Management Vulnerability




           __________________________________________________________

                       The U.S. Department of Energy
                     Computer Incident Advisory Center
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___
             __________________________________________________________

                             INFORMATION BULLETIN

            Cisco 11000 Series Switch, Web Management Vulnerability

June 4, 2001 20:00 GMT                                             Number L-90
______________________________________________________________________________
PROBLEM:       The Cisco Content Service Switch (CSS) 11000 series switches do 
               not enforce the correct restrictions for accessing the web 
               management URL. A user can gain access to the web management 
               interface without being authenticated on the CSS 11000 series 
               switch.
 
PLATFORM:      The CSS 11000 series switches (formerly known as Arrowpoint), 
               the CSS 11050, CSS 11150 and CSS 11800 hardware platforms. 
               These switches run the Cisco WebNS Software. WebNS software 
               revisions affected by this vulnerability are:
               * earlier than 4.01B29s
               * earlier than 4.10B17s
 
DAMAGE:        This vulnerability results in users gaining access to secure 
               data that controls the operation of the switch.
 
SOLUTION:      Apply workarounds and patches as described in vendor bulletin 
               below.
______________________________________________________________________________
VULNERABILITY  The risk is MEDIUM. Any user can use the web management URL to 
ASSESSMENT:    bypass authentication to the switch management system, and 
               modify the switch operation and settings. 
______________________________________________________________________________

[******  Start Cisco Advisory ******]

Cisco Security Advisory: Cisco Content Service Switch 11000 Series Web 
Management Vulnerability 
==============================================================================
Revision 1.0 
For Public Release 2001 May 31 at 1500 UTC 
------------------------------------------------------------------------
Summary 
======= 
The Cisco Content Service Switch (CSS) 11000 series switches do not enforce 
the correct restrictions for accessing the web management URL.
After successful authentication users are redirected to the web management 
URL. If users directly connect to the redirected URL they are granted 
access to the web management interface without having to reauthenticate. 
This vulnerability results in users gaining access to secure data.

This vulnerability is documented as Cisco bug ID CSCdu20931.

This advisory will be posted at 
http://www.cisco.com/warp/public/707/arrowpoint-webmgmt-vuln-pub.shtml.

Affected Products 
================= 

The CSS 11000 series switches (formerly known as Arrowpoint), consist of 
the CSS 11050, CSS 11150 and CSS 11800 hardware platforms. They run the 
Cisco WebNS Software.

All switches running the following WebNS software revisions are affected by 
this vulnerability:
* earlier than 4.01B29s 
* earlier than 4.10B17s

No other Cisco product is currently known to be affected by this 
vulnerability.

To determine your software revision, type version at the command line 
prompt.

Details 
======= 
If users bookmark the URL they are redirected to after a successful 
authentication on the CSS 11000 series switches, they can later access the 
web management interface without having to reauthenticate.
This vulnerability is documented as Cisco bug ID CSCdu20931, which requires 
a CCO account to view.

Impact 
====== 
A user can gain access to the web management interface without being 
authenticated on the CSS 11000 series switch. This vulnerability can be 
minimized by restricting http access to the CSS 11000 series switch.

Software Versions and Fixes 
=========================== 
This vulnerability has been fixed in the following Cisco WebNS software 
revisions
* 4.01B29s or later 
* 4.10B17s or later

Obtaining Fixed Software 
======================== 
Cisco is offering free software upgrades to remedy this vulnerability for 
all affected customers. Customers with service contracts may upgrade to any 
software release containing the feature sets they have purchased.
Customers with contracts should obtain upgraded software through their 
regular update channels. For most customers, this means that upgrades 
should be obtained via the Software Center on Cisco's Worldwide Web site at 
http://www.cisco.com.

Customers without contracts 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

See http://www.cisco.com/warp/public/687/Directory.shtml for additional TAC 
contact information, including instructions and e-mail addresses for use in 
various languages.
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. Please do not contact either "psirt@cisco.com" or 
"security-alert@cisco.com" for software upgrades.

Workarounds 
=========== 
Web Management can be disabled on the switch.
Access control lists can be applied to restrict HTTP access to the Cisco 
CSS 11000 series switch. Access control lists also affect traffic to the 
Virtual interface of the Cisco CSS 11000 series switch, so must be applied 
with care. For further details on configuring access lists please refer to 
the product documentation:
http://www.cisco.com/univercd/cc/td/doc/product/webscale/css/bsccfggd/profiles 
.htm 
http://www.cisco.com/univercd/cc/td/doc/product/webscale/css/advcfggd/sgacleql 
.htm

Exploitation and Public Announcements 
===================================== 
The Cisco PSIRT is not aware of any public announcements or malicious use 
of the vulnerabilities described in this advisory.

Status of This Notice: FINAL 
============================ 
This is a final notice. Although Cisco cannot guarantee the accuracy of all 
statements in this notice, all of the facts have been checked to the best 
of our ability. Cisco does not anticipate issuing updated versions of this 
notice unless there is some material change in the facts. Should there be a 
significant change in the facts, Cisco may update this notice.

Distribution 
============ 
This notice will be posted on Cisco's Worldwide Web site at 
http://www.cisco.com/warp/public/707/arrowpoint-webmgmt-vuln-pub.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 
* bugtraq@securityfocus.com 
* firewalls@lists.gnac.com 
* first-teams@first.org (includes CERT/CC) 
* cisco@spot.colorado.edu 
* cisco-nsp@puck.nether.net 
* comp.dcom.sys.cisco 
* Various internal Cisco mailing lists
Future updates of this notice, if any, will be placed on Cisco's Worldwide 
Web server, but may or may not be actively announced on mailing lists or 
newsgroups. Users concerned about this problem are encouraged to check the 
URL given above for any updates.

Revision History 
================ 
Revision 1.0 May 31, 2001 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 
Web site at 
http://www.cisco.com/warp/public/707/sec_incident_response.shtml. This 
includes instructions for press inquiries regarding Cisco security notices.
------------------------------------------------------------------------ 
This notice is Copyright 2001 by Cisco Systems, Inc. This notice may be 
redistributed freely after the release date given at the top of the text, 
provided that redistributed copies are complete and unmodified, and include 
all date and version information. 
------------------------------------------------------------------------

[******  End Cisco Advisory ******]
_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of Cisco Systems for the 
information contained in this bulletin.
_______________________________________________________________________________


CIAC, the Computer Incident Advisory Center, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.

CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
    Voice:    +1 925-422-8193 (7x24)
    FAX:      +1 925-423-8002
    STU-III:  +1 925-423-2604
    E-mail:   ciac@ciac.org

Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.

   World Wide Web:      http://www.ciac.org/
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PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins.  If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.

This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
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otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
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Warning: The bulletin is already in .bulletin_lists
Entry: L-90: Cisco 11000 Series Switch, Web Management Vulnerability






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