[cifs-protocol] Protocol changes in KB2992611 [115012312316449]

Obaid Farooqi obaidf at microsoft.com
Tue Feb 3 08:37:29 MST 2015

Hi Andrew:
I am trying to reproduce the issue. So far I am unsuccessful. 
From the posts you mentioned, the credentials manager does not open if a windows 8.1 machine is joined to Samba domain and kb2992611 is applied? Just want to confirm I got this right.

I am using Samba 4.1.6 that Ubuntu installs.

Obaid Farooqi
Escalation Engineer | Microsoft

Exceeding your expectations is my highest priority.  If you would like to provide feedback on your case you may contact my manager at nkang at Microsoft dot com

-----Original Message-----
From: Andrew Bartlett [mailto:abartlet at samba.org] 
Sent: Monday, February 2, 2015 8:42 PM
To: Obaid Farooqi
Cc: MSSolve Case Email; cifs-protocol at samba.org
Subject: Re: [cifs-protocol] Protocol changes in KB2992611 [115012312316449]

On Tue, 2015-01-27 at 15:55 +1300, Andrew Bartlett wrote:
> I've got into our server with the (presumably) failing packet.  The 
> client appears to have started requiring that BACKUPKEY_BACKUP_GUID, 
> ie the ServerWrap protocol 7f752b10-178e-11d1-ab8f-00805f14db40 
> actually work (we do not implement it yet).
> Before this update, the client is happy for this to fail, now it 
> persists with continuing to contact the server, and having this 
> operation fail.  This repeats and repeats.
> I'm also quite curious as to why an update in 2014 is moving clients 
> to require use of the RC4 based protocol, given all the bad press that 
> cyrpto had got.  This failure is just after a successful call to the 
> ClientWrap protocol, which should be much better.
> I await your thoughts,

Any news on this?  I'm planning on making an implementation of the ServerWrap protocol, but it would help to know what actually changed, so I know if this is likely to help.


Andrew Bartlett
Andrew Bartlett
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba

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