CVE-2020-1170 Cloud Filter Arbitrary File Creation EOP

The Cloud Filter driver, cldflt.sys, on Windows 10 v1803 and later, prior to the December 2020 updates, did not set the IOFORCEACCESSCHECK or OBJFORCEACCESSCHECK flags when calling FltCreateFileEx and FltCreateFileEx2 within its HsmpOpCreatePlaceholders function with attacker controlled input. Th...