Bug #6563

Kai Blin kai at samba.org
Tue Jul 20 06:06:34 MDT 2010

On Tue, 20 Jul 2010 10:08:13 +0200 Alan DeKok <aland at ox.org> wrote:

(Resent with mailing list in cc, sorry for the noise)

> https://bugzilla.samba.org/show_bug.cgi?id=6563
>   There is an increasing number of people who are running into this
> bug. I'm seeing an email a week about it.  This means even more
> people are seeing it, and giving up without asking for help.

I initially stopped looking into this because comment #23 reported this
to be fixed in 3.4.3. It seems not to be the case, though, looking at
later reports. However, this has been a busy month at $dayjob and also
in my spare time, so it didn't quite bubble back up on top of my
todo-list yet.

>   The bug is that when using MSCHAP and ntlm_auth, the response NT-Key
> is wrong, and the client rejects the MS-CHAP response.  It has been
> reported across a wide range of Samba versions, including the most
> recent ones.  The only solution found so far is to downgrade to 3.0.x,
> which works.

My experience with that mode of ntlm_auth is limited and last time I
tried it failed consistently on 3.0.x and newer versions.

>   The bug includes a python script to reproduce the problem, so
> there's no need for a complicated test setup.  We can also supply a
> willing set of beta testers who can verify if a patch fixes the
> problem.

This is only partly true, as I described in comment #20. I'll try to
make some time to look into this again.


Kai Blin
Worldforge developer http://www.worldforge.org/
Wine developer http://wiki.winehq.org/KaiBlin
Samba team member http://www.samba.org/samba/team/

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