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Microsoft Security Advisory: CVE-2018-8115 fix is available on GitHub
This one isn’t particularly interesting from a vulnerability point of view — it’s a zero day that hasn’t been exploited as yet. CVE-2018-8115 | Windows Host Compute Service Shim Remote Code Execution Vulnerability can be fixed by installing a new version of the file hcsshim
What I found interesting: The new version of hcsshim isn’t in the Microsoft Update Catalog. It’s posted on GitHub. The new hcsshim isn’t from an official Microsoft account, mind you, but from a personal account, darrenstahlmsft.
Times change, eh?
UPDATE: Michael Hanselmann, who discovered and reported the security hole, has posted a brief explanation.