RE: Passwords with Lan Manager (LM) under Windows

["Craig Wright" <cwright () bdosyd com au>]

Further to the last post 
There are a number of issues with NTLMv2 and legacy applications such as
Windows RAS that cause lower levels of authentication

I still say that Kerberos or IPsec based auth is the best policy in
windows. LanMan, NTLMv1 or V2 are vulnerable.

Precomputed tables may have been uncommon 12 months ago - but that was
then and this is now.

Cain & Abel will use sorted Rainbow Tables for Cryptanalysis attacks

Craig 

-----Original Message-----
From: Thor (Hammer of God) [mailto:thor () hammerofgod com] 
Sent: 22 September 2005 12:00
To: Craig Wright; pand0ra.usa () gmail com; pen-test () securityfocus com
Subject: Re: Passwords with Lan Manager (LM) under Windows


----- Original Message -----
From: "Craig Wright" <cwright () bdosyd com au>
To: <pand0ra.usa () gmail com>; <pen-test () securityfocus com>
Sent: Wednesday, September 21, 2005 12:32 PM
Subject: RE: Passwords with Lan Manager (LM) under Windows


> Even NTLMv2  will break the hashing into chunks which are able to be 
> individually broken down.

I'm not sure what you mean... NTLMv2 uses a single 128bit key for the
hash, 
challenge and response...  Or are you referring to the NTLM2 session 
response key (56+56+16)? If so, that is not the same thing as NTLMv2...
Can 
you elaborate please ?

t


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