full-disclosure - HOWTO: Crack Oracle Security like a peanut?

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Message-ID: <3425089d0508250523f9606ad@mail.gmail.com>
Date: Thu Aug 25 13:23:59 2005
From: fabien.kraemer at gmail.com (Fabien Kraemer)
Subject: HOWTO: Crack Oracle Security like a peanut?

Now i need a beer ;)

On 8/25/05, Simon Marechal <simon@....b-care.net> wrote:
> Jeroen wrote:
> > I can reproduce the things mentioned for user/pass-combinations sized 64
> > bits. For larger combinations (> 64 bits ---> 2 or more 64 bits DES blocks)
> > I can't figure out yet how things work. Have some of you guys 'n girls
> > already played around with this description? And are you willing to share
> > results?
> >
> > Thanks,
> >
> > Jeroen
> 
> AFAIK, it works this way:
> * usernames and password are concatenated in a string s
> * s is converted to unicode
> * it is encrypted using des ncbc mode, with key 0x123456789abcdef, and
> initialization vector 0
> * the same string is encrypted again using the updated initialization
> vector as a key, with another null initialization vector
> * the updated initialization vector is the hash
> 
> Attached is the corresponding john plugin. It is somehow like the mscash
> plugin in the sense that it uses usernames, that means it wont work
> properly out of the box, manual tweaking is required. Bob the Butcher
> will provide this cipher by default when it ships.
> 
> At least it is way better than those SQL password checking scripts.
> 
> 
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