{"id":"CVE-2018-8355","published":"2018-08-15T17:00:00Z","modified":"2024-08-05T06:54:35Z","title":"A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft…","vendor":"Microsoft","product":"ChakraCore","tier":"core","eol":null,"affectedVersions":[{"vendor":"Microsoft","product":"ChakraCore","versions":["ChakraCore"]},{"vendor":"Microsoft","product":"Internet Explorer 11","versions":["Windows 10 for 32-bit Systems","Windows 10 for x64-based Systems","Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows 10 Version 1703 for 32-bit Systems","Windows 10 Version 1703 for x64-based Systems","Windows 10 Version 1709 for 32-bit Systems","Windows 10 Version 1709 for x64-based Systems","Windows 10 Version 1803 for 32-bit Systems","Windows 10 Version 1803 for x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Edge","versions":["Windows 10 for 32-bit Systems","Windows 10 for x64-based Systems","Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows 10 Version 1703 for 32-bit Systems","Windows 10 Version 1703 for x64-based Systems","Windows 10 Version 1709 for 32-bit Systems","Windows 10 Version 1709 for x64-based Systems","Windows 10 Version 1803 for 32-bit Systems","Windows 10 Version 1803 for x64-based Systems"]}],"description":{"text":"A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka \"Scripting Engine Memory Corruption Vulnerability.\" This affects ChakraCore, Internet Explorer 11, Microsoft Edge. This CVE ID is unique from CVE-2018-8353, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.","provenance":"source","from":"CVE.org"},"summary":{"text":"A memory corruption flaw in the scripting engine's handling of objects in memory affects Microsoft's ChakraCore component, which is part of Microsoft browsers including Internet Explorer 11 and Microsoft Edge. The available data does not specify the attack vector, authentication requirements, or user interaction needed, so an attacker's exact prerequisites cannot be confirmed; the flaw permits remote code execution.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:18:54Z"},"cvss":null,"epss":{"score":0.67896,"percentile":0.99318,"date":"2026-10-28","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":{"pulseCount":0,"pulses":[],"provenance":"machine"},"cwes":[],"references":[{"url":"http://www.securitytracker.com/id/1041457","tags":["vdb-entry","x_refsource_SECTRACK"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8355","tags":["x_refsource_CONFIRM"]},{"url":"http://www.securityfocus.com/bid/104978","tags":["vdb-entry","x_refsource_BID"]},{"url":"https://www.exploit-db.com/exploits/45432/","tags":["exploit","x_refsource_EXPLOIT-DB"]}],"techniques":[{"id":"T1189","name":"Drive-by Compromise","tactics":["initial-access"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"exploitation_technique","evidence":[],"confidence":"high"},{"id":"T1204.002","name":"Malicious File","tactics":["execution"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"exploitation_technique","evidence":[],"confidence":"high"},{"id":"T1499.004","name":"Application or System Exploitation","tactics":["impact"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"primary_impact","evidence":[],"confidence":"high"},{"id":"T1574","name":"Hijack Execution Flow","tactics":["execution","stealth"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"primary_impact","evidence":[],"confidence":"high"},{"id":"T1005","name":"Data from Local System","tactics":["collection"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"secondary_impact","evidence":[],"confidence":"high"},{"id":"T1136","name":"Create Account","tactics":["persistence"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"secondary_impact","evidence":[],"confidence":"high"},{"id":"T1485","name":"Data Destruction","tactics":["impact"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"secondary_impact","evidence":[],"confidence":"high"},{"id":"T1565","name":"Data Manipulation","tactics":["impact"],"provenance":"source","basis":"ctid-cve","bases":["ctid-cve"],"basisDetail":"CTID attack_to_cve (Phase 2)","mappingType":"secondary_impact","evidence":[],"confidence":"high"}],"reports":[],"affected":[{"ecosystem":"NuGet","package":"Microsoft.ChakraCore","vulnerableRanges":["<1.10.2"],"patched":["1.10.2"],"from":["GHSA-h8jq-5737-hpcf"],"provenance":"source"}],"advisories":[{"id":"GHSA-h8jq-5737-hpcf","url":"https://github.com/advisories/GHSA-h8jq-5737-hpcf","severity":"HIGH","ecosystem":"NuGet","package":"Microsoft.ChakraCore","vulnerableRanges":["<1.10.2"],"patched":["1.10.2"],"provenance":"source","from":"GHSA"}],"euvd":{"id":"EUVD-2022-4108","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-4108","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[{"id":45432,"url":"https://www.exploit-db.com/exploits/45432","title":"Microsoft Edge Chakra JIT - 'localeCompare' Type Confusion","type":"dos","platform":"windows","date":"2018-09-18","verified":true,"provenance":"source"},{"id":45432,"url":"https://www.exploit-db.com/exploits/45432","title":"Microsoft Edge Chakra JIT - 'localeCompare' Type Confusion","type":"dos","platform":"windows","date":"2018-09-18","verified":true,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":2,"earliest":"2018-09-18"},"first":{"date":"2018-09-18","source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/45432"},"provenance":"source"},"exploitRefs":["https://www.exploit-db.com/exploits/45432/","https://www.exploit-db.com/exploits/45432"],"flow":[{"stage":"exploitation","techniques":["T1189","T1204.002"],"provenance":"source"},{"stage":"primary","techniques":["T1574","T1499.004"],"provenance":"source"},{"stage":"secondary","techniques":["T1136","T1005","T1485","T1565"],"provenance":"source"}],"timeline":[{"date":"2018-08-15","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2018-8355","provenance":"source"},{"date":"2018-09-18","kind":"exploit-public","label":"First public exploit: Exploit-DB (EDB-45432)","url":"https://www.exploit-db.com/exploits/45432","provenance":"source"}],"speed":{"daysToPublicExploit":34,"firstExploitFrom":"Exploit-DB","daysToKev":null},"priority":{"score":24.9,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.86,"detail":"percentile 0.9932"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 2 Exploit-DB entries; 1 advisory exploit reference"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":0.0,"detail":"no CVSS"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}