Update to Disable Mitigation against Spectre, Variant 2 You can now check what changed using diff on the different commits: □ I’ve saved all the versions from the PowerShell Gallery and pushed them into a github repo.Īs of version 1.0.2, the module hosted on the PSGallery is digitally signed. The MSRC hasn’t indicated a ProjectURI in the metadata of the module □ How do I follow the changes in the SpeculationControl module?.Using PowerShell to Check Remote Windows Systems for CVE-2017-5754 (Meltdown) and CVE-2017-5715 (Spectre) Robbins shows a nice way to achieve this on his blog: How do I use the module against remote computers?Ī fellow MVP Mike F.Import-Module ~\Downloads\SpeculationControl\1.0.1\SpeculationControl.psd1 -Verbose Import the module (version 1.0.1 in my case) Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass Change the execution policy for the current console Save-Module -Name SpeculationControl -Repository PsGallery -Verbose -Path ~/Downloads Import-PackageProvider -Name Nuget -Verbose Destination "C:\Program Files\PackageManagement\ProviderAssemblies\nuget\2.8.5.207" Mkdir "C:\Program Files\PackageManagement\ProviderAssemblies\nuget\2.8.5.207"Ĭopy ~/downloads/ ` (Get-FileHash ~/downloads/ -Algorithm SHA512 | Select -Expand Hash).ToLower() -eq Check the integrity of the downloaded file Here’s what I did on my Windows 10 (1709) where the Nuget provider wasn’t present: Why? Because it depends on the version of PowerShell you run, if you run the console with elevated admin privileges, whether the Nuget provider has already been bootstraped or not… (see more on my Inside the Nuget bootstraping process post) It may not be that easy and straightforward as you may think, when you’re supposed to start by installing the module with the following command The MSRC also released a zip version of it that you’ll find on The PowerShell gallery hosts the module: Where do I find the SpeculationControl PowerShell module provided by the MSRC?.If you run an Antivirus (AV) software (you should), please make sure it’s compatible with the security fixes released by software or OS vendors. Please note that you’ll need a microcode update or firmware update from your device manufacturer to be able to fully mitigate these vulnerabilities whatever OS and software you run. While it isn’t just a Microsoft issue, a PM.org list member (Mike) provided the following plan for Windows based computers: Important: Windows security updates released January 3, 2018, and antivirus software.Alert (TA18-004A): Meltdown and Spectre Side-Channel Vulnerability Guidance.CPU hardware vulnerable to side-channel attacks: Vulnerability Note VU#584653.I should probably start distributing stickers sayin ‘Human error inside’ □ These vulnerabilities have the widest scope I’ve ever seen and show how fragile IT devices and software are is. This isn’t an exhaustive list of posts, it’s just a starting point. Where to start? What about reading the following posts?.CVE-2017-5754 – (Meltdown), rogue data cache load, memory access permission check performed after kernel memory read.CVE-2017-5753 – (Spectre), bounds check bypass.CVE-2017-5715 – (Spectre), branch target injection.
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