{"api_version":"1","generated_at":"2026-07-23T03:22:27+00:00","cve":"CVE-2016-9463","urls":{"html":"https://cve.report/CVE-2016-9463","api":"https://cve.report/api/cve/CVE-2016-9463.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2016-9463","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9463"},"summary":{"title":"CVE-2016-9463","description":"Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.","state":"PUBLISHED","assigner":"hackerone","published_at":"2017-03-28 02:59:00","updated_at":"2025-04-20 01:37:25"},"problem_types":["CWE-303","CWE-287","CWE-303 Incorrect Implementation of Authentication Algorithms (CWE-303)"],"metrics":[{"version":"3.0","source":"nvd@nist.gov","type":"Primary","score":"8.1","severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"6.8","severity":"","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","data":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:P","baseScore":6.8,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"}}],"references":[{"url":"https://hackerone.com/reports/148151","name":"https://hackerone.com/reports/148151","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"],"title":"#148151 SMB User Authentication Bypass and Persistence - HackerOne","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3","name":"https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"[stable8.2] Merge pull request #2198 from owncloud/smb-auth-fix · owncloud/apps@a0e07b7 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274","name":"https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"Double verify the SMB response · nextcloud/apps@b85ace6 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087","name":"https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"Double verify the SMB response · nextcloud/apps@decb91f · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-006","name":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-006","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"],"title":"advisory – Nextcloud","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791","name":"https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"[stable9] Merge pull request #2198 from owncloud/smb-auth-fix · owncloud/apps@16cbccf · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/","name":"https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Technical Description","Third Party Advisory"],"title":"Operation OwnedCloud: Exploitation and Post-exploitation Persistence - Rhino Security Labs","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732","name":"https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"title":"Merge pull request #2198 from owncloud/smb-auth-fix · owncloud/apps@5d47e7b · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://owncloud.org/security/advisory/?id=oc-sa-2016-017","name":"https://owncloud.org/security/advisory/?id=oc-sa-2016-017","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"],"title":"Security Advisories – ownCloud","mime":"text/html","httpstatus":"404","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-9463","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-9463","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9","version":"affected Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2016","cve_id":"9463","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"nextcloud","cpe5":"nextcloud_server","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":"2024-08-06T02:50:38.584Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://hackerone.com/reports/148151"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://owncloud.org/security/advisory/?id=oc-sa-2016-017"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-006"}],"title":"CVE Program Container"}],"cna":{"affected":[{"product":"Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9","vendor":"n/a","versions":[{"status":"affected","version":"Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9"}]}],"datePublic":"2017-03-27T00:00:00.000Z","descriptions":[{"lang":"en","value":"Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-303","description":"Incorrect Implementation of Authentication Algorithms (CWE-303)","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2017-03-28T02:57:01.000Z","orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","shortName":"hackerone"},"references":[{"tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274"},{"tags":["x_refsource_MISC"],"url":"https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791"},{"tags":["x_refsource_MISC"],"url":"https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/"},{"tags":["x_refsource_MISC"],"url":"https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732"},{"tags":["x_refsource_MISC"],"url":"https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3"},{"tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/148151"},{"tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087"},{"tags":["x_refsource_MISC"],"url":"https://owncloud.org/security/advisory/?id=oc-sa-2016-017"},{"tags":["x_refsource_MISC"],"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-006"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"support@hackerone.com","ID":"CVE-2016-9463","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9","version":{"version_data":[{"version_value":"Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Incorrect Implementation of Authentication Algorithms (CWE-303)"}]}]},"references":{"reference_data":[{"name":"https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274","refsource":"MISC","url":"https://github.com/nextcloud/apps/commit/b85ace6840b8a6704641086bc3b8eb8e81cb2274"},{"name":"https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791","refsource":"MISC","url":"https://github.com/owncloud/apps/commit/16cbccfc946c8711721fa684d78135ca1fb64791"},{"name":"https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/","refsource":"MISC","url":"https://rhinosecuritylabs.com/2016/10/operation-ownedcloud-exploitation-post-exploitation-persistence/"},{"name":"https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732","refsource":"MISC","url":"https://github.com/owncloud/apps/commit/5d47e7b52646cf79edadd78ce10c754290cbb732"},{"name":"https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3","refsource":"MISC","url":"https://github.com/owncloud/apps/commit/a0e07b7ddd5a5fd850a6e07f8457d05b76a300b3"},{"name":"https://hackerone.com/reports/148151","refsource":"MISC","url":"https://hackerone.com/reports/148151"},{"name":"https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087","refsource":"MISC","url":"https://github.com/nextcloud/apps/commit/decb91fd31f4ffab191cbf09ce4e5c55c67a4087"},{"name":"https://owncloud.org/security/advisory/?id=oc-sa-2016-017","refsource":"MISC","url":"https://owncloud.org/security/advisory/?id=oc-sa-2016-017"},{"name":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-006","refsource":"MISC","url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-006"}]}}}},"cveMetadata":{"assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","assignerShortName":"hackerone","cveId":"CVE-2016-9463","datePublished":"2017-03-28T02:46:00.000Z","dateReserved":"2016-11-19T00:00:00.000Z","dateUpdated":"2024-08-06T02:50:38.584Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"nvd":{"publishedDate":"2017-03-28 02:59:00","lastModifiedDate":"2025-04-20 01:37:25","problem_types":["CWE-303","CWE-287","CWE-303 Incorrect Implementation of Authentication Algorithms (CWE-303)"],"metrics":{"cvssMetricV30":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:P","baseScore":6.8,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"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:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*","versionEndExcluding":"9.0.54","matchCriteriaId":"D6E3F368-B854-430E-AB8F-496675C4E210"},{"vulnerable":true,"criteria":"cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.1","matchCriteriaId":"8288B81D-CA35-46EB-A7E7-B60B193E3F81"},{"vulnerable":true,"criteria":"cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:*","versionStartIncluding":"8.2.0","versionEndExcluding":"8.2.9","matchCriteriaId":"D681D54F-2420-4791-98D3-74E8A2E5F919"},{"vulnerable":true,"criteria":"cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.4","matchCriteriaId":"E4E30105-E26E-4913-8597-66C1C4ABA11B"},{"vulnerable":true,"criteria":"cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:*","versionStartIncluding":"9.1.0","versionEndExcluding":"9.1.2","matchCriteriaId":"8E9501A9-E507-4A81-954B-D6D3223EE2F8"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2016","CveId":"9463","Ordinal":"1","Title":"CVE-2016-9463","CVE":"CVE-2016-9463","Year":"2016"},"notes":[{"CveYear":"2016","CveId":"9463","Ordinal":"1","NoteData":"Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.","Type":"Description","Title":"CVE-2016-9463"},{"CveYear":"2016","CveId":"9463","Ordinal":"2","NoteData":"2017-03-27","Type":"Other","Title":"Published"},{"CveYear":"2016","CveId":"9463","Ordinal":"3","NoteData":"2017-03-27","Type":"Other","Title":"Modified"}]}}}