[cifs-protocol] [EXTERNAL] Kerberos kinit failures since Nov 2022 patch - TrackingID#2211090040006256

Michael Bowen Mike.Bowen at microsoft.com
Wed Nov 9 16:39:04 UTC 2022

[DocHelp to bcc, Support mail to cc]

Hi Andrew,

Thanks for your inquiry. I've created case number 2211090040006256 to track this issue. In your correspondence, please leave the case number in the subject line and use reply all. One of our engineers will contact you soon

Best regards,
Mike Bowen
Escalation Engineer - Microsoft Open Specifications

-----Original Message-----
From: Andrew Bartlett <abartlet at samba.org> 
Sent: Tuesday, November 8, 2022 7:37 PM
To: Interoperability Documentation Help <dochelp at microsoft.com>
Cc: cifs-protocol mailing list <cifs-protocol at lists.samba.org>; Joseph Sutton <josephsutton at catalyst.net.nz>
Subject: [EXTERNAL] Kerberos kinit failures since Nov 2022 patch

Related but separate to 2211090040000278

We are running Windows 2019 with the Nov 2022 patches. 

KrbtgtFullPacSignature has been set to 3 but we see the same behaviour at 0.

We create an account using Windows ADUC then set this account supports
AES128 and AES 256 in 'account options'.  

With these values set, being 0x18 is msDS-SupportedEncryptionTypes, it is no longer possible to kinit to this account, even when the Kerberos client supports AES, and even if the kerberos client does not propose. 

However, if we add the RC4 bit then it works, but given the security release is about disabling RC4 we are trying to avoid that. 

We can supply network traces etc, please provide the link.


Andrew Bartlett

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