RE: Checkpoint FW-1 on Nokia - potential user enumeration bug?

From: Christopher Lyon <cslyon(at)netsvcs.com>
Date: Wed Jan 08 2003 - 19:53:00 EST

The version of IPSO that I am running 3.6 doesn't do what you are seeing below. So I would suggest upgrading it. Also, if you are able to telnet to the Nokia from the outside that is a bad thing! Since this box is based on a UNIX/Linux variant it could potentially have a few issues with enumeration and or issues with telnet or dictionary attacks. IPSO is a hardened OS and is striped down to a basic level but there are a few things still left on it. There are default accounts on the Nokia they could be guessed. I would turn off telnet access, rename the default accounts, rename fw1adm and enable SSH. SSH just to give a little bit more security and the SSH daemon acts differently on bad user names and passwords. I would also lock down outside access to this the Nokia unless you need to remotely manage it. If you do need to manage it I would at least put your IP's in an allow list and run your tests from different addresses.

Hope that helps.

-----Original Message-----
From: Chris McNab [mailto:chris.mcnab@trustmatta.com] Sent: Tuesday, January 07, 2003 4:55 PM
To: pen-test@securityfocus.com
Subject: Checkpoint FW-1 on Nokia - potential user enumeration bug?

Hey,

I was performing a pentest recently for a client, and found what seems to be
a user enumeration bug within Nokia IPSO (unknown as to which version and
patchlevel) running Checkpoint FW-1:

pipex-gw>telnet xxx.xxx.xxx.xxx
Trying xxx.xxx.xxx.xxx ... Open

   IPSO (checkpointcharlie) (ttyp0)
login: root
Password:
Login incorrect
login: blah
Password:
Login incorrect
login: fw1adm
Password:
Password:
Login incorrect
login: fw1adm
Password:
Password:
Login incorrect
Login timed out after 300 seconds
[Connection to xxx.xxx.xxx.xxx closed by foreign host] pipex-gw>

Obviously the fw1adm user exists, being the standard account under FW-1..
but I was wondering if anyone had seen this before, or even if this issue
had been addressed by Nokia?

Thanks,

Chris

Chris McNab
Technical Director

Matta Security Limited
18 Noel Street
London W1F 8GN

Tel: 08700 77 11 00

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This list is provided by the SecurityFocus Security Intelligence Alert (SIA) Service. For more information on SecurityFocus' SIA service which automatically alerts you to the latest security vulnerabilities please see: https://alerts.securityfocus.com/ Received on Fri Jan 10 06:57:06 2003