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RE: wonder what tools or test was used
From: "Mueller, Daniel" <daniel.mueller () nmci-isf com>
Date: Mon, 17 Jul 2006 12:03:26 -0400

 Is there a decent Brute Force Password hash tester for NTLM V2 hashes
or passphrases?
Thanks
Dan

-----Original Message-----
From: Gareth Davies [mailto:gareth.davies () mynetsec com] 
Sent: Monday, July 17, 2006 4:05 AM
To: Brent Clark
Cc: pen-test () securityfocus com
Subject: Re: wonder what tools or test was used

Brent Clark wrote:
Hey all

With the hack on Debian,s gluck machine and the writes up about it.
In the 5th paragraph of the following link:

http://www.zdnet.com.au/news/security/soa/Debian_locks_out_developers_
after_server_hack/0,2000061744,39263432,00.htm


It reads
"An investigation of developer passwords revealed a number of weak 
passwords whose accounts have been locked in response," Schulze wrote.

My question is, how would they go about that? What tools or tests were

needed to test whether an account has a strong or weak password.

The only thing I can think of is a foreach on the usernames and some 
type of brute force / dictionary attack. I suppose it would have been 
nice if they mentioned the service / protocal that was compromised.



Brute forcing the password hashes with a straight simple dictionary list

would show which accounts have weak passwords, a hybrid attack could 
show which accounts have stronger but still unsatisfactory passwords.

Any tool could be used such as JTR or Cain and Abel or even the now 
defunct but very fast L0phtcrack.

They could have even blasted through it really quickly with Rainbow 
Tables and the time memory trade off.

They machine was comprised through a local 2.6.x kernel exploit, a core 
dump problem where it doesn't allocate permissions properly.

It's the PRCTL Core Dump Handling exploit - BID 18874 / CVE-2006-2451

-- 
Gareth Davies - ISO 27001 LA, OPST

Manager - Security Practice

Network Security Solutions MSC Sdn. Bhd.
Suite E-07-21, Block E, Plaza Mont' Kiara, No. 2 Jalan Kiara,
Mont' Kiara, 50480
Kuala Lumpur, Malaysia 
Phone: +603-6203 5303 or +603-6203 5920

www.mynetsec.com


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