The flaw - tracked as CVE-2021-41117 (CVSS score: 8.7) - concerns a bug in the pseudo-random number generator used by the library, resulting in the creation of a weaker form of public SSH keys, which, owing to their low entropy - i.e., the measure of randomness - could boost the probability of key duplication. It has been found to impact GitKraken versions 7.6.x, 7.7.x, and 8.0.0, released between May 12, 2021, and September 27, 2021. The problematic dependency, called " keypair," is an open-source SSH key generation library that allows users to create RSA keys for authentication-related purposes. If you don’t perform this step, you will need to manually start the agent, or will need to enter the password for your SSH private key every time you wish to use it.Code hosting platform GitHub has revoked weak SSH authentication keys that were generated via the GitKraken git GUI client due to a vulnerability in a third-party library that increased the likelihood of duplicated SSH keys.Īs an added precautionary measure, the Microsoft-owned company also said it's building safeguards to prevent vulnerable versions of GitKraken from adding newly generated weak keys. Write-Verbose -Message 'Stating SSh Agent' Write-Verbose -Message ('SSH Agent Status is stopped: ' -f $sshAgentStopped) To do this, I have added the following to my PowerShell profiles: $sshAgentStopped = 'Stopped' -eq (Get-Service -Name 'ssh-agent' -ErrorAction Silentl圜ontinue).status Optional – Start the SSH Agent when PowerShell loadsįor the most seamless experience, we should automatically start the SSH Agent just prior to our first need of it. Using your favourite tool (PowerShell or Services.msc), change the start-up type of the service “OpenSSH Authentication Agent” from Disabled to Manual. We will need to change the settings for the SSH Agent’s Windows Service. Sshcommand = C:/Windows/System32/OpenSSH/ssh.exe Step 5 – Change the start-up properties of the SSH Agent Service. Via the Git config command: git config -global core.sshcommand "C:/Windows/System32/OpenSSH/ssh.exe" There are two ways you can do this, using the git config command, or directly editing the global configuration file directly. Next, we need to tell Git you use the OpenSSH client provided by Windows and not the one bundled with it. Step 4 – Update your global Git configuration to use the OpenSSH for Windows Remove all users and groups except for SYSTEM and your user account.Removing inheritance (select copy when prompted).By default, it isn’t, so we will need to update the security permissions on this file by: The SSH key agent will check the permissions of your private key to ensure it is correctly secured. By default, you can/should call the private key id_rsa and the public key should be id_rsa.pub. Get your existing private key (or generate a new SSH keypair) and place the private key into the. Step 3 – Put your private SSH keys in the right directory, and specify the correct permissions Check the “OpenSSH Client” is in the list of installed optional features, otherwise install it using the “Add a Feature” button. Hit Start > Type “Optional Feature” > go to the Setting App. Step 2 – Ensure OpenSSH client for Windows is installed Step 1 – Install Gitĭownload Git and install it as you normally would. Personally, I prefer using SSH as it is the tool that I am more familiar and comfortable with it. This is a good question! For most users, I recommend that they use the built-in Git Credential Provider. Side: Why not just use the Credential Provider? I spent some time getting everything to work and wanted to help anyone else who might be having issues. If you are not familiar with the SSH Agent, it caches your private key, so you are not prompted to enter your password for your private key every single time you use it. I was setting up my new Surface Pro 6 and wanted to ensure that I was using the built in SSH client and particularly, the SSH Agent. The biggest benefit for the average user is that they can now use a supported OpenSSH client, without downloading and installing any other software. This client has been installed by default since the April 2018 Update (1803). Microsoft has included an OpenSSH client with Windows 10 since the Fall Creators Release (1709).
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