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Open Source and information security mailing list archives
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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. > > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ > > >
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