Windows 8.1 Update (KB 2919355) prevents interaction with WSUS 3.2 over SSL
Update Monday 4/14/2014 - Please see https://support.microsoft.com/kb/2959977 for additional information.
There is a known issue which causes some PCs updated with the Windows 8.1 Update (KB 2919355) to stop scanning against Windows Server Update Services 3.0 Service Pack 2 (WSUS 3.0 SP2 or WSUS 3.2) servers which are configured to use SSL and have not enabled TLS 1.2.
The problem is specific to the following scenario when all of the following are true
- Client PC has installed Windows 8.1 Update KB 2919355
- Windows 8.1 with Windows 8.1 Update KB 2919355 attempts to scan against WSUS 3.2 running on any affected platform:
- Windows Server 2003 SP2, or
- Windows Server 2003 R2 SP2, or
- Windows Server 2008 SP2, or
- Windows Server 2008 R2 SP1
- HTTPS and Secure Sockets Layer (SSL) are enabled on the WSUS server
- TLS 1.2 is not enabled on the server
Only users who have enabled HTTPS and have not enabled TLS 1.2 on their WSUS 3.2 servers and who are also using these WSUS 3.2 servers to manage PCs running the Windows 8.1 Update KB 2919355 are affected by this issue. Please note, while we do recommend the use of HTTPS on WSUS servers, HTTPS and TLS 1.2 are not enabled by default.
If you are using WSUS 3.2 on Windows Server 2008 R2, you may perform either of the following steps to restore the scan functionality if you have deployed the Windows 8.1 Update KB2919355.
- Enable TLS 1.2 (follow the instructions under More Information > SCHANNEL\Protocols subkey), or
- Disable HTTPS on WSUS
If you are using WSUS 3.2 on an operating system other than Windows Server 2008 R2, you may perform the following step to restore the scan functionality.
- Disable HTTPS on WSUS
When Microsoft releases an update that resolves the issue, you may re-enable HTTPS on WSUS.
Microsoft plans to issue an update as soon as possible that will correct the issue and restore the proper behavior for Windows 8.1 Update KB 2919355 scanning against all supported WSUS configurations. Until that time, we are delaying the distribution of the Windows 8.1 Update KB 2919355 to WSUS servers.
You may still obtain the Windows 8.1 Update (KB 2919355) from the Windows Update Catalog or MSDN. However, we recommend that you suspend deployment of this update in your organization until we release the update that resolves this issue. You may also find the workarounds discussed in this article to be useful for testing this Windows 8.1 Update for your organization. Thank you for your patience during this time.
The WSUS and Windows Update Teams