{"schemaVersion":3,"id":"CVE-2018-0891","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"ChakraCore, and Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, and Internet Explorer and Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allow information disclosure, due to how the scripting engine handles objects in memory, aka \"Scripting Engine Information Disclosure Vulnerability\". This CVE ID is unique from CVE-2018-0939.","dates":{"published":"2018-03-14T17:00:00.000Z","modified":"2024-09-16T20:12:50.573Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.14192,"percentile":0.96556,"severity":"medium","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.14192},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.14944,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.14192,"percentile":0.96556}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.14944,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.14192,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.14192,"percentile":0.96556}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"44312","name":"Internet Explorer - 'RegExp.lastMatch' Memory Disclosure","source":"exploit-database","url":"https://www.exploit-db.com/exploits/44312","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["windows"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"windows","file":"exploits/windows/dos/44312.js","codes":["CVE-2018-0891"]},"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime","description":"The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/401.html"}],"affected":[{"vendor":"microsoft corporation","product":"chakracore, microsoft edge, internet explorer","name":"ChakraCore, Microsoft Edge, Internet Explorer","label":"chakracore, microsoft edge, internet explorer","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016.","noFixRecorded":false,"fixedIn":null}],"versionsText":"Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016.","eol":null,"hubHref":"/vendor/microsoft_corporation/chakracore_microsoft_edge_internet_explorer"},{"vendor":"microsoft","product":"internet_explorer","name":"Internet Explorer","label":"internet_explorer","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"9","noFixRecorded":false,"fixedIn":null},{"text":"10","noFixRecorded":false,"fixedIn":null},{"text":"11","noFixRecorded":false,"fixedIn":null}],"versionsText":"9 | 10 | 11","eol":{"isEol":true,"eolDate":"2016-01-12T00:00:00.000Z","matchMethod":"name_exact","cycle":{"name":"9","label":"9","eolFrom":"2016-01-12T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"internet-explorer","label":"Internet Explorer","category":"app"}},"hubHref":"/vendor/microsoft/internet_explorer"}],"affectedCount":2,"eol":{"hasEol":true,"count":1},"references":[{"url":"http://www.securityfocus.com/bid/103309","label":"www.securityfocus.com/bid/103309","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://www.exploit-db.com/exploits/44312/","label":"www.exploit-db.com/exploits/44312/","hostname":"www.exploit-db.com","tags":["Exploit","X Refsource EXPLOIT DB","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1040507","label":"www.securitytracker.com/id/1040507","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0891","label":"portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0891","hostname":"portal.msrc.microsoft.com","tags":["X Refsource CONFIRM","Patch","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2018-03-14T17:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-16T20:12:50.573Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T01:19:07.207Z","stale":false,"partial":false}}