Improvements and fixes
This security update addresses the following issues:
Provides protections against an additional subclass of speculative execution side-channel vulnerability known as Speculative Store Bypass (CVE-2018-3639) for AMD-based computers. These protections aren't enabled by default. For Windows Server guidance, follow the instructions in KB4072698. Use this guidance document to enable mitigations for Speculative Store Bypass (CVE-2018-3639). Additionally, use the mitigations that have already been released for Spectre Variant 2 (CVE-2017-5715) and Meltdown (CVE-2017-5754).
Addresses an issue that affects PowerShell remoting loop back using non-administrator accounts. For more details, see Windows Security change affecting PowerShell.
- Security updates to Windows Kernel, Windows Storage and Filesystems, Windows Wireless Networking, and the Microsoft JET Database Engine.
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.
Known issues in this update
|Local users who are part of the local “Administrators“ group may not be able to remotely access shares on Windows Server 2008 SP2 machines after installing the January 8th, 2019 security updates. This does not affect domain accounts in the local "Administrators" group.|| |
To work around this issue use either a local account that is not part of the local “Administrators” group or any domain user (including domain administrators).
We recommend this workaround until a fix is available in a future release.