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

From: Rob Lindenbusch <lfcrob(at)nicusa.com>
Date: Thu Jan 09 2003 - 09:11:28 EST

I have recently seen a "similar" behavior with SecureRemote under FW-1 4.1

Users attempting to authenticate to the VPN get an "unknown user" error if the account does not exist and an "authentication failure" message if the user does exist but the password is incorrect. This was tested on a Nokia, but I would assume it is a FW-1 issue not confined to those boxes.

Rob

-----Original Message-----
From: Chris McNab [mailto:chris.mcnab@trustmatta.com] Sent: Tuesday, January 07, 2003 7:55 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 Tue Jan 21 14:51:19 2003