[cifs-protocol] [EXTERNAL] Looking for missing documentation (MS-KILE?) for CVE-2024-21427, CVE-2024-20674 and PAC signature changes

[Tom Devey]

Hi Andrew,

More as an FYI. Microsoft is no longer publishing errata's and have moved to full document publishing for servicing and security updates.

I contacted the team responsible for the Open Specifications publishing and they did publish security updates today for MS-NRPC and MS-APDS.

You can find more information and links to the documents on the "Service Releases": [MS-WINPROTLP]: What's New and Changed | Microsoft Learn<https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-winprotlp/e168a474-7de2-421c-b460-91adf87692a3>.
From: Andrew Bartlett <abartlet at samba.org>
Sent: Monday, April 8, 2024 4:27 PM
To: Interoperability Documentation Help <dochelp at microsoft.com>
Cc: cifs-protocol mailing list <cifs-protocol at lists.samba.org>
Subject: [EXTERNAL] Looking for missing documentation (MS-KILE?) for CVE-2024-21427, CVE-2024-20674 and PAC signature changes

Kia Ora Dochelp,

Recently we have seen CVE-2024-21427 and CVE-2024-20674 issued.

The first CVE-2024-21427, we know what the details are from our report, but we don't have details of the protocol change from the MS side, so would like the full details in case there were protocol changes we didn't anticipate.

We don't have any details of the protocol changes for CVE-2024-20674, and as it is marked Critical we would like to ensure we don't have a similar issue or can follow any protocol changes made for interoperability.

Finally, we have noticed in November (or earlier) that the Server signature in the Kerberos PAC is no longer RC4_HMAC, even with RC4 tickets.  This makes a lot of sense, but I don't see any documentation and I would like to update our implementation to match.

We would greatly appreciate any information that is available on these recent Kerberos protocol changes.

Thanks,

Andrew Bartlett

--
Andrew Bartlett (he/him)       https://samba.org/~abartlet/
Samba Team Member (since 2001) https://samba.org<https://samba.org/>
Samba Team Lead                https://catalyst.net.nz/services/samba
Catalyst.Net Ltd

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