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We just received an e-mail from Digicert, a portion of which I'll quote here:
Microsoft recently notified us that one or more of the code signing certificates your organization uses to sign kernel-mode driver packages expires after June 30, 2021. According to Microsoft's guidelines, certificates used to sign kernel-mode driver packages must expire before this date. You can find more information about Microsoft's guidelines on the Microsoft docs site.
Starting on August 10, 2020, Microsoft will require that we revoke any code signing certificates that expire after June 30, 2021 and that are used to sign kernel-mode driver packages.
They further go on to say that they'll replace our certificate with one that expires on April 15, 2021, the same day as the updated cross-certificate expiration.
We've previously been aware that the cross-certificates would expire early next year (the one we use was slated to go poof on Feb. 22, 2021). The Microsoft doc they reference mentions this, and it further stresses that certificates that expire after that will continue to work, just not for KMCS purposes. Nowhere do I see anything about a June 30 date or anything about revocation. Has anyone heard this information previously?
They also mentioned nothing about any compensation we may receive for losing over half of the duration of our 3-year certificate.
What are the impacts of the certificate being revoked? Is this comparable to an early expiration (e.g., new signatures will not work, but older code countersigned with a timestamp will continue to operate), or will even older code signed with this certificate now fail to load?
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