[nsp] Cisco Security Advisory: CiscoWorks Application Vulnerabilities

Wed Aug 13 12:37:38 EDT 2003

CiscoWorks Common Management Foundation (CMF), also packaged as part of
CiscoWorks CD One, provides an application infrastructure foundation,
allowing all CiscoWorks applications to share a common model for data
storage, login, user role definitions, access privileges, and security
protocols, as well as for navigation and launch management.

Two vulnerabilities exist in CiscoWorks CMF versions prior to and
including 2.1. The first vulnerability is a privilege escalation
vulnerability where a guest user may obtain administrative privileges
within the application via a specially crafted URL. The second
vulnerability is an ability to run arbitrary commands on the CiscoWorks
server due to an error in processing user input.

This notice will be posted at 
http://www.cisco.com/warp/public/707/cisco-sa-20030813-cmf.shtml.

Cisco is making patches available for CMF versions 2.0 and 2.1, free of
charge, to correct the problem.

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

The following products are affected:

  * All versions of CiscoWorks CD One (1st through 5th editions)

  * Resource Manager Essentials (RME) versions 2.0, 2.1, and 2.2

  * Cisco Resource Manager (CRM) versions 1.0 and 1.1

CiscoWorks CD One is included as the base for all CiscoWorks management
solutions, such as the LAN Management Solution, Routed WAN Management
Solution, Small Network Management Solution, and VPN/Security Management
Solution.

To determine the version of the Common Management Foundation which is
installed, navigate through the menus within CiscoWorks starting with
the tab on the left titled "Server Configuration" and locate the screen
titled "Applications and Versions" under the folder named "About the
Server". Look for the entry in the table labeled "Common Management
Foundation" and the corresponding version.

Details
=======

The first vulnerability allows a non-privileged user of the CiscoWorks
application, including the guest account if enabled, to send a specially
crafted URL to the CiscoWorks server to acquire administrative
privileges without authentication. Cisco Bug ID CSCdy33916 describes
this vulnerability.

The second vulnerability permits an authenticated user of the CiscoWorks
application to run arbitrary commands on the CiscoWorks server as
"casuser", the username under which the application runs. Cisco Bug ID
CSCea15281 describes this vulnerability.

Impact
======

  * CSCdy33916 - The guest user or a normal user is capable, with a 
    specifically crafted URL, of obtaining administrative privileges
    within the application allowing the user to perform tasks which it
    might otherwise not be allowed to do. Examples of such tasks might
    be approval of scheduled changes, such as software upgrades, adding
    and removing devices, adding, removing, and modifying accounts with
    the server, and viewing device configurations stored in the local
    archive.

  * CSCea15281 - A normal user is capable, with a specifically crafted
    URL, of running commands remotely on the CiscoWorks server to perform
    tasks which they may otherwise not have access to do. Examples of
    such tasks might be viewing device configurations stored in the local
    archive.

Software Versions and Fixes
===========================

Both vulnerabilities have been resolved in CiscoWorks Common Services 2.2.

Patches for CMF versions 2.0 and 2.1 should be available by the end
of August 2003 (date subject to change). Should the availability date
change, Cisco will update this advisory to reflect the new availability
date.

Obtaining Fixed Software
========================

Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Product Upgrade Tool at
http://tools.cisco.com/gct/Upgrade/jsp/index.jsp ( registered customers
only) .

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 assistance with the upgrade, which
should be free of charge.

Customers who purchase/license the product directly 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 obtain an applicable software patch
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 at cisco.com

Please have your product serial number available and give the URL of
this notice as evidence of your entitlement to a free patch. Free
patches for non-contract customers must be requested through the TAC.

Please do not contact either "psirt at cisco.com" or "security-alert at cisco.com"
for software upgrades.

If you need assistance with the implementation of the workarounds, or
have questions on the workarounds, please contact the Cisco Technical
Assistance Center (TAC).

See 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.

Workarounds
===========

  * CSCdy33916 - The guest user account may be disabled, limiting the
    exposure to only the trusted users of the CiscoWorks server. However,
    a software upgrade or patch is required to completely resolve the
    vulnerability.

  * CSCea15281 - There is no workaround. A software upgrade or patch is
    required.

Exploitation and Public Announcements
=====================================

The Cisco PSIRT is not aware of any malicious use of the vulnerabilities
described in this advisory.

The vulnerabilities described in this advisory were both
originally found by internal testing. Prior to disclosure, the
bug described by CSCdy33916 was also reported by Omicron from
Portcullis Computer Security Ltd. Their report can be found at
http://www.portcullis-security.com/News/archives/advisory/cisco-sa-20030813.htm

Status of This Notice: INTERIM
==============================

This is an INTERIM advisory. 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 advisory unless there is some material change
in the facts. Should there be a significant change in the facts, Cisco
will update this advisory.

A stand-alone copy or paraphrase of the text of this security advisory
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 will be posted on Cisco's worldwide website at 
http://www.cisco.com/warp/public/707/cisco-sa-20030813-cmf.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 at cisco.com
  * bugtraq at securityfocus.com
  * full-disclosure at lists.netsys.com
  * first-teams at first.org (includes CERT/CC)
  * cisco at spot.colorado.edu
  * cisco-nsp at puck.nether.net
  * comp.dcom.sys.cisco
  * Various internal Cisco mailing lists

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 | 2003-August-13 | Initial Public  |
| 1.0      |                | 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/warp/public/707/sec_incident_response.shtml.
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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This notice is Copyright 2003 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.

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