Windows 7/8.1 Preview Rollups (September 19, 2017)

[English]On September 19 ,2017, Microsoft released the Monthly Preview rollups KB4038803 for Windows 7 and KB4038774 for Windows 8.1 (and the Server Pendants). Here are some information about these updates.

Update KB4038803 for Windows 7

Update KB4038803 (Preview of Monthly Rollup for Windows 7 SP1 und Windows Server 2008 R2 SP1) has been released on September 19, 2017 and contains improvements and fixes from monthly Rollup KB4038777 (September 12, 2017) and the following quality improvements:

• Addressed issue where WMI data doesn't properly migrate during an in-place upgrade to Windows 10 on machines running Windows 7 SP1 with WMF 5.1 installed.
• Addressed issue where Failover Cluster Manager incorrectly reports replication networks as down when they're actually online after installing KB3125574 or KB2937350.
• Addressed issue where RDP fails when FIPS is enabled and Triple DES (3DES) Cipher is disabled. In such a scenario, for RDP to work, you must enable system-level FIPS Algorithm policy.
• Addressed issue where applications that have LDAP referral chasing options enabled use a TCP dynamic port connection that doesn't close until the applications close or the calling OS restarts. With sufficient time and volume, these applications may completely consume all TCP dynamic ports. If that occurs, network communications will fail for any protocol or operation using dynamic ports. This issue was introduced by the July and August 2017 cumulative updates starting with KB4025337 and KB4025341.
• Improved the reliability of MP4 video playback on Internet Explorer 11.

This optional update, which is not considered to be security-relevant, is distributed via Windows Update, but can also be downloaded and installed from the Microsoft Update Catalog. Microsoft is not aware of known problems. If you are not affected by the fixes addressed above, there is no reason to install the update now, since it is offered as an October update.

Update KB4038774 for Windows 8.1

Update KB4038774 (Preview of Monthly Rollup for Windows 8.1 and Windows Server 2012 R2) has been released on September 19, 2017 and contains improvements and fixes from monthly Rollup KB4038792 (September 12, 2017) and the following quality improvements:

• Addressed issue where the performance counter query causes CPU usage to increase for extended periods of time. This occurs because EnumCounterObjects() queries the data for all counters when it tries to get the names of all counters.
• Addressed issue where revoking a certificate associated with a disabled user account in the CA management console fails. The error is "The user name or password is incorrect. 0x8007052e (WIN32: 1326 ERROR_LOGON_FAILURE)".
• Addressed issue where using a smart card to log on to a Remote Desktop Server sometimes causes the server to stop responding.
• Addressed issue where LSASS deadlocks with the Server Message Block 2.0 (SMB 2.0) client redirector. All attempts to log on to a Remote Desktop Server fail.
• Updated the BitLocker.psm1 PowerShell script to not log passwords when logging is enabled.
• Cleaned up leaked validation ports associated with snapshots in VMMS.
• Updated the SPN and UPN uniqueness feature to work within the forest root tree and across other trees in the forest. The updated NTDSAI.DLL won't allow a subtree to add an SPN or a UPN as a duplicate across the entire forest.
• Addressed issue where Windows Server 2016 domain controllers (DC) may log audit events with ID 4625 and 4776. The DCs use Microsoft Windows Security information that has truncated user names and domain names for logons that come from client applications that use wldap32.dll.
• Addressed issue where DFSR replication may stop intermittently and cause backup failures.
• Addressed issue where users can't access file shares when the Windows Server 2012 R2 file server resource comes back online after it has gone offline.

The security-relevant update is optional and will be rolled out on all systems on October patchday. It is available through Windows Update but can be downloaded from Microsoft Update Catalog. Currently there is no reason to install the preview rollup unless you are affected by the bugs/fixes above.

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