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Re: Craking Serv-u passwords stored in .ini file.
From: Marius Huse Jacobsen <mahuja () c2i net>
Date: Thu, 9 Sep 2004 18:03:02 +0200

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Hello Hans,

Thursday, September 2, 2004, 10:44:23 PM, you wrote:
HP> Actually, the http://passcracking.com site will crack MD5 hashes using
HP> rainbow tables, but they are non-salted, as salted MD5 is too
HP> difficult for precomputation attacks (for now).

I can feed them the salted MD5, just removing the salt pre/post-fix.
Imagine the password "me" and the salt "ab". In such a case, such a
lookup would return "abme" as the password. I know the "ab" is the
salt, so I remove it, and I have the "me" password.

In other words, as long as it's not input to the hash algo in a
different way, just added to the password before being sent to the
hasher, these tables will be able to look them up - today.

However, if there's a limit of 8 characters, then it's 8 - saltsize
that becomes the new 'max size password' that those tables can look up
for you.

This presumes, of course, that the salt characters are part of the
character set that are used for creating the tables in the first
place.

- --
Best regards,
 Marius                            mailto:mahuja () c2i net
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