ChakraCore and Microsoft Edge in Windows 10 1703, 1709, and Windows Server, version 1709 allows an attacker to gain the same user rights as the current user, due to how the scripting engine handles objects in memory. This could be exploited using write-AV when writing to a slot of a JavaScript null scope object.
This CVE ID is unique from CVE-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11871, and CVE-2017-11873.
github.com/chakra-core/ChakraCore
github.com/chakra-core/ChakraCore/commit/b44ee8300ae03026d3c39cdbbfd32d410ac187f6
github.com/chakra-core/ChakraCore/pull/4226
nvd.nist.gov/vuln/detail/CVE-2017-11870
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11870
web.archive.org/web/20210516131515/www.securityfocus.com/bid/101731
web.archive.org/web/20210517135249/www.securitytracker.com/id/1039780
www.exploit-db.com/exploits/43182