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Re: wonder what tools or test was used
From: Gareth Davies <gareth.davies () mynetsec com>
Date: Mon, 17 Jul 2006 16:05:08 +0800

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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