Re: Pen-testing remote VPN services over IP

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Date: 7 Nov 2003 05:43:01 -0000
To: pen-test@securityfocus.com

Chris

Check out IKEcrack from Anton Rager. http://sourceforge.net/projects/ikecrack/

IKECrack is an open source IKE/IPSec authentication crack tool. This tool is designed to bruteforce or dictionary attack the key/password used with Pre-Shared-Key [PSK] IKE authentication. The open source version of this tool is to demonstrate proof-of-concept, and will work with RFC 2409 based aggressive mode PSK authentication.

Travis

>Hi,
>
>As part of some research I am undertaking recently, I'd like to know if any
>of you have any decent information relating to the following areas of
>_remote_ assessment of VPN services over IP.
>
>The topics I have covered and documented fully so far include:
>
>- IPsec enumeration, scanning for UDP/500 and using Roy Hills' tools
>(ike-scan) to identify the gateway
>- Various overflows relating to ISAKMP / IKE packets being sent to UDP/500,
>as in MITRE CVE
>- Offline aggressive mode IKE pre-shared key cracking, by sniffing VPN
>traffic and using IKECrack
>- Check Point aggressive mode IKE username enumeration (using Roy Hills'
>fw1-ike-userguess over UDP/500)
>- Check Point Telnet authentication service (TCP/259) user enumeration
>- Check Point information leak attacks that reveal network interface
>addresses, over both TCP/256 and TCP/264
>- Check Point RDP encapsulation filter bypass techniques, using UDP/259
>- Offline Microsoft PPTP (TCP/1723) MS-CHAP challenge-response cracking
>
>Two areas in which I've identified a need for tools are:
>
>- Check Point brute force password grinding tool for FWZ or IKE, to
>compromise SecuRemote username/password combinations
>- PPTP brute force tool, to compromise those user/password combinations also
>
>Does anyone know of such offensive brute force tools, or techniques I have
>missed (against ISAKMP and Check Point)? if so, any input would be greatly
>appreciated.
>
>Regards,
>
>Chris
>
>
>Chris McNab
>Technical Director
>
>Matta
>18 Noel Street
>London W1F 8GN
>
>http://www.trustmatta.com
>
>
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Network with over 10,000 of the brightest minds in information security
at the largest, most highly-anticipated industry event of the year.
Don't miss RSA Conference 2004! Choose from over 200 class sessions and
see demos from more than 250 industry vendors. If your job touches
security, you need to be here. Learn more or register at
http://www.securityfocus.com/sponsor/RSA_pen-test_031023
and use priority code SF4.
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• Previous message: Erik Birkholz: "RE: CEH and Intense School"
• Maybe in reply to: Chris McNab: "Pen-testing remote VPN services over IP"
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