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                   Defcom Labs Advisory def-2000-02



               Cisco Catalyst remote command execution



Author: Olle Segerdahl 

Release Date: 2000-10-26

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------------------------=[Brief Description]=-------------------------

The Catalyst 3500 XL series switches web configuration interface lets

any user execute any command on the system without logging in.



This issue was extremely easy to find, as Cisco provides a link to it

from the first page of the web configuration service. This is one of

the reasons I have decided to go public with the issue so soon.



------------------------=[Affected Systems]=--------------------------

Cisco Catalyst 3500 XL series switches

Probably all Catalyst switches using the same or similar software.



----------------------=[Detailed Description]=------------------------

Cisco Catalyst 3500 XL series switches have a webserver configuration

interface. This interface lets any anonymous web user execute any

command without supplying any authentication credentials by simply

requesting the /exec location from the webserver. An example follows:

http://catalyst/exec/show/config/cr

This URL will show the configuration file, with all user passwords.



---------------------------=[Workaround]=-----------------------------

Disable the web configuration interface completely. Await software fix.



Refer to your vendor's documentation for information on how to

configure the switch to disable the web configuration interface.



--------------------------=[Vendor Status]=---------------------------

Vendor was notified on 2000-10-10.

I was denied any information about what other products might have the

same problems and have not heard anything from Cisco since....



Expect a software fix release from Cisco soon.



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