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, aka “Scripting Engine Memory Corruption Vulnerability”. When trying to get inlineCache
s for a ScriptFunctionWithInlineCache
, if the function got redefered and was not reparsed, the function body (and inlineCache
on function body) won’t be there, potentially leading to a privilege escalation.
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-2017-11870, and CVE-2017-11873.
github.com/chakra-core/ChakraCore
github.com/chakra-core/ChakraCore/commit/9d211a417757ba1ddcd0f2e72d9553535256107e
github.com/chakra-core/ChakraCore/pull/4226
nvd.nist.gov/vuln/detail/CVE-2017-11871
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11871
web.archive.org/web/20210124114740/www.securityfocus.com/bid/101730
web.archive.org/web/20210517135249/www.securitytracker.com/id/1039780