#Dssrv2 digital sentry server how to#
I've had two NVR's go down due to this issue.īelow, we cover the impacted security vendors and how to fix the issue.
#Dssrv2 digital sentry server update#
It looks like Microsoft forgot to make this update available for Windows 7 Embedded OS which installs the ability to use SHA-2 code signing.Īs soon as the Aug 2019 security rollup update is installed, " KB4512506 " upon reboot, the OS indicates "Windows cannot verify the digital signature for this file " which of course is caused by the lack of the SHA-2 code sign support.
The problem occurs because this update uses now required SHA-2 signing, but mistakenly assumes the embedded OS servers and NVRs have been upgraded from SHA-1, which is not the case for many systems. IPVM has received multiple reports of Windows 7 and Windows Server 2008R2 systems that will no longer boot after installing Microsoft 8/2019 Security update ' KB4512506 Security Monthly Quality Rollup'. Windows 7 updates are causing VMS servers to fail to boot.Īfter running the update, impacted systems do not boot as normal, instead display this warning screen:
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