KLA11253 Microsoft Advisory for Microsoft Windows

On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre and Meltdown) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees. On May 21st, a new subclass of speculative execution side channel vulnerabilities known as Speculative Store Bypass (SSB) has been announced and assigned CVE-2018-3639.

An attacker who has successfully exploited this vulnerability may be able to read privileged data across trust boundaries. Vulnerable code patterns in the operating system (OS) or in applications could allow an attacker to exploit this vulnerability. In the case of Just-in-Time (JIT) compilers, such as JavaScript JIT employed by modern web browsers, it may be possible for an attacker to supply JavaScript that produces native code that could give rise to an instance of CVE-2018-3639. However, Microsoft Edge, Internet Explorer, and other major browsers have taken steps to increase the difficulty of successfully creating a side channel.

Original advisories

ADV180012

Related products

Microsoft-Windows

Microsoft-Windows-Server

CVE list

KB list

4467680

4467708

4467691

4467702

4467686

4467696

4480963

4480964

4480972

4480975

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Affected Products

• Windows Server, version 1803 (Server Core Installation)Windows 10 for 32-bit SystemsWindows 10 for x64-based SystemsWindows 10 Version 1607 for 32-bit SystemsWindows 10 Version 1607 for x64-based SystemsWindows 10 Version 1703 for 32-bit SystemsWindows 10 Version 1703 for x64-based SystemsWindows 10 Version 1709 for 32-bit SystemsWindows 10 Version 1709 for 64-based SystemsWindows 10 Version 1803 for 32-bit SystemsWindows 10 Version 1803 for x64-based SystemsWindows 7 for 32-bit Systems Service Pack 1Windows 7 for x64-based Systems Service Pack 1Windows Server 2008 R2 for x64-based Systems Service Pack 1Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Windows Server 2016Windows Server 2016 (Server Core installation)Windows Server, version 1709 (Server Core Installation)