[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sun, 14 Feb 2010 07:39:30 +0300
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: NTLMv2 Challenge/Response Cracking
On Fri, Feb 12, 2010 at 10:17:02AM -0600, jmk wrote:
> I've posted a patch against John 1.7.3.4 (w/ Jumbo 2 applied) for NTLMv2
> challenge/response cracking:
>
> http://www.foofus.net/jmk/smbchallenge.html
> http://www.foofus.net/jmk/tools/jtr/john-1.7.3.4-jumbo-2-netntlmv2.diff
[...]
> The Jumbo-2 patch currently contains support for LMv1, NTLMv1, and LMv2
> challenge/response. I originally assumed that a LMv2 response would
> always be sent along with a NTLMv2 exchange, so I never bothered with
> NTLMv2. However, I've now found that Windows 7 likes to zero out the
> LMv2 fields, so NTLMv2 is necessary.
Thank you for contributing this. Going forward, I suggest that you (and
others) base your patches on the latest version of JtR (with the jumbo
patch), which would be 1.7.4.2-jumbo-2 this time. Also, I suggest that
you start making more use of the wiki to publish patches:
http://openwall.info/wiki/john/patches
Anyway, I've integrated your patch into john-1.7.3.4-jumbo-3 and
john-1.7.4.2-jumbo-3, which I've just released. I've also added your
netntlm.pl to the run directory. And I've edited your loader.c hacks
replacing the unreasonable uses of sprintf() - I did not test these
changes at all (other than that they compile), so I'd appreciate it if
you review and/or test them. Finally, I noticed that you use
fmt_default_binary_hash() and fmt_default_get_hash() in your "formats",
which will result in poor performance when many hashes are loaded at
once - you could want to correct that in a new revision of your code.
While at it, I've integrated Alexandre Hamelin's oracle11_fmt.c (support
for Oracle 11g SHA-1 based hashes). Somehow this was missed previously.
The updated jumbo patches are linked from the usual place:
http://www.openwall.com/john/#contrib
Thanks again,
Alexander
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
