{"api_version":"1","generated_at":"2026-07-23T08:24:34+00:00","cve":"CVE-2017-8495","urls":{"html":"https://cve.report/CVE-2017-8495","api":"https://cve.report/api/cve/CVE-2017-8495.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2017-8495","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-8495"},"summary":{"title":"CVE-2017-8495","description":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an attacker to bypass Extended Protection for Authentication when Kerberos fails to prevent tampering with the SNAME field during ticket exchange, aka \"Kerberos SNAME Security Feature Bypass Vulnerability\" or Orpheus' Lyre.","state":"PUBLISHED","assigner":"microsoft","published_at":"2017-07-11 21:29:00","updated_at":"2025-04-20 01:37:25"},"problem_types":["CWE-287","Security Feature Bypass"],"metrics":[{"version":"3.0","source":"nvd@nist.gov","type":"Primary","score":"7.5","severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"6","severity":"","vector":"AV:N/AC:M/Au:S/C:P/I:P/A:P","data":{"version":"2.0","vectorString":"AV:N/AC:M/Au:S/C:P/I:P/A:P","baseScore":6,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"}}],"references":[{"url":"http://www.securityfocus.com/bid/99424","name":"http://www.securityfocus.com/bid/99424","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"title":"Microsoft Windows Kerberos CVE-2017-8495 Security Bypass Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495","name":"https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"],"title":"{{windowTitle}}","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securitytracker.com/id/1038862","name":"http://www.securitytracker.com/id/1038862","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"title":"Windows Kerberos SNAME Field Integrity Validation Flaw Lets Remote Authenticated Users Bypass Extended Protection for Authentication - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.orpheus-lyre.info/","name":"https://www.orpheus-lyre.info/","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"title":"Orpheus' Lyre","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-8495","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-8495","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Microsoft Corporation","product":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.","version":"affected Microsoft Windows","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_10","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_10","cpe6":"1511","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_10","cpe6":"1607","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_10","cpe6":"1703","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_7","cpe6":"*","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_8.1","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_rt_8.1","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_server_2008","cpe6":"*","cpe7":"sp2","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_server_2008","cpe6":"r2","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_server_2012","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_server_2012","cpe6":"r2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8495","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows_server_2016","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-05T16:34:23.205Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://www.orpheus-lyre.info/"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495"},{"name":"99424","tags":["vdb-entry","x_refsource_BID","x_transferred"],"url":"http://www.securityfocus.com/bid/99424"},{"name":"1038862","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"],"url":"http://www.securitytracker.com/id/1038862"}],"title":"CVE Program Container"}],"cna":{"affected":[{"product":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.","vendor":"Microsoft Corporation","versions":[{"status":"affected","version":"Microsoft Windows"}]}],"datePublic":"2017-07-11T00:00:00.000Z","descriptions":[{"lang":"en","value":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an attacker to bypass Extended Protection for Authentication when Kerberos fails to prevent tampering with the SNAME field during ticket exchange, aka \"Kerberos SNAME Security Feature Bypass Vulnerability\" or Orpheus' Lyre."}],"problemTypes":[{"descriptions":[{"description":"Security Feature Bypass","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2017-07-13T15:57:01.000Z","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","shortName":"microsoft"},"references":[{"tags":["x_refsource_MISC"],"url":"https://www.orpheus-lyre.info/"},{"tags":["x_refsource_CONFIRM"],"url":"https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495"},{"name":"99424","tags":["vdb-entry","x_refsource_BID"],"url":"http://www.securityfocus.com/bid/99424"},{"name":"1038862","tags":["vdb-entry","x_refsource_SECTRACK"],"url":"http://www.securitytracker.com/id/1038862"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secure@microsoft.com","DATE_PUBLIC":"2017-07-11T00:00:00","ID":"CVE-2017-8495","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.","version":{"version_data":[{"version_value":"Microsoft Windows"}]}}]},"vendor_name":"Microsoft Corporation"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an attacker to bypass Extended Protection for Authentication when Kerberos fails to prevent tampering with the SNAME field during ticket exchange, aka \"Kerberos SNAME Security Feature Bypass Vulnerability\" or Orpheus' Lyre."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Security Feature Bypass"}]}]},"references":{"reference_data":[{"name":"https://www.orpheus-lyre.info/","refsource":"MISC","url":"https://www.orpheus-lyre.info/"},{"name":"https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495","refsource":"CONFIRM","url":"https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495"},{"name":"99424","refsource":"BID","url":"http://www.securityfocus.com/bid/99424"},{"name":"1038862","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1038862"}]}}}},"cveMetadata":{"assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","assignerShortName":"microsoft","cveId":"CVE-2017-8495","datePublished":"2017-07-11T21:00:00.000Z","dateReserved":"2017-05-03T00:00:00.000Z","dateUpdated":"2024-09-16T18:34:48.946Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"nvd":{"publishedDate":"2017-07-11 21:29:00","lastModifiedDate":"2025-04-20 01:37:25","problem_types":["CWE-287","Security Feature Bypass"],"metrics":{"cvssMetricV30":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.6,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:S/C:P/I:P/A:P","baseScore":6,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":6.8,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*","matchCriteriaId":"21540673-614A-4D40-8BD7-3F07723803B0"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:*","matchCriteriaId":"232581CC-130A-4C62-A7E9-2EC9A9364D53"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*","matchCriteriaId":"E01A4CCA-4C43-46E0-90E6-3E4DBFBACD64"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:*","matchCriteriaId":"AEE2E768-0F45-46E1-B6D7-087917109D98"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:*:*","matchCriteriaId":"7519928D-0FF2-4584-8058-4C7764CD5671"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:*:*","matchCriteriaId":"A7F51B5F-AA19-4D31-89FA-6DFAC4BA8F0F"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_rt_8.1:*:*:*:*:*:*:*:*","matchCriteriaId":"197E82CB-81AF-40F1-A55C-7B596891A783"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:*:*","matchCriteriaId":"0C28897B-044A-447B-AD76-6397F8190177"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:*","matchCriteriaId":"2ACA9287-B475-4AF7-A4DA-A7143CEF9E57"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:*:*","matchCriteriaId":"80EB5690-B20F-457A-A202-FBADAA17E05C"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*","matchCriteriaId":"DB18C4CE-5917-401E-ACF7-2747084FD36E"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*","matchCriteriaId":"AF6437F9-6631-49D3-A6C2-62329E278E31"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2017","CveId":"8495","Ordinal":"1","Title":"CVE-2017-8495","CVE":"CVE-2017-8495","Year":"2017"},"notes":[{"CveYear":"2017","CveId":"8495","Ordinal":"1","NoteData":"Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an attacker to bypass Extended Protection for Authentication when Kerberos fails to prevent tampering with the SNAME field during ticket exchange, aka \"Kerberos SNAME Security Feature Bypass Vulnerability\" or Orpheus' Lyre.","Type":"Description","Title":"CVE-2017-8495"},{"CveYear":"2017","CveId":"8495","Ordinal":"2","NoteData":"2017-07-11","Type":"Other","Title":"Published"},{"CveYear":"2017","CveId":"8495","Ordinal":"3","NoteData":"2017-07-13","Type":"Other","Title":"Modified"}]}}}