CVE-2020-26276

{"containers": {"cna": {"affected": [{"product": "fleet", "vendor": "fleetdm", "versions": [{"status": "affected", "version": "< 3.5.1"}]}], "descriptions": [{"lang": "en", "value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-290", "description": "CWE-290: Authentication Bypass by Spoofing", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-12-17T19:40:14.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/mattermost/xml-roundtrip-validator"}, {"tags": ["x_refsource_MISC"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"}], "source": {"advisory": "GHSA-w3wf-cfx3-6gcx", "discovery": "UNKNOWN"}, "title": "SAML authentication vulnerability in Fleet", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2020-26276", "STATE": "PUBLIC", "TITLE": "SAML authentication vulnerability in Fleet"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "fleet", "version": {"version_data": [{"version_value": "< 3.5.1"}]}}]}, "vendor_name": "fleetdm"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-290: Authentication Bypass by Spoofing"}]}]}, "references": {"reference_data": [{"name": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx", "refsource": "CONFIRM", "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"}, {"name": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607", "refsource": "MISC", "url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"}, {"name": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020", "refsource": "MISC", "url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"}, {"name": "https://github.com/mattermost/xml-roundtrip-validator", "refsource": "MISC", "url": "https://github.com/mattermost/xml-roundtrip-validator"}, {"name": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities", "refsource": "MISC", "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"}]}, "source": {"advisory": "GHSA-w3wf-cfx3-6gcx", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T15:56:04.500Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/mattermost/xml-roundtrip-validator"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2020-26276", "datePublished": "2020-12-17T19:40:14.000Z", "dateReserved": "2020-10-01T00:00:00.000Z", "dateUpdated": "2024-08-04T15:56:04.500Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "fleet", "vendor": "fleetdm", "versions": [{"status": "affected", "version": "< 3.5.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*", "matchCriteriaId": "73A23340-9D58-472D-9ADD-4313F6B9C332", "versionEndExcluding": "3.5.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet."}, {"lang": "es", "value": "Fleet es un administrador de osquery de c\u00f3digo abierto.&#xa0;En Fleet versiones anteriores a 3.5.1, debido a problemas en el an\u00e1lisis de XML de la biblioteca est\u00e1ndar de Go, una respuesta v\u00e1lida SAML puede ser mutada por un atacante para modificar el documento confiable.&#xa0;Esto puede resultar en permitir inicios de sesi\u00f3n no verificados desde un IdP SAML.&#xa0;Los usuarios que configuran Fleet con inicio de sesi\u00f3n SSO pueden ser vulnerables a este problema.&#xa0;Este problema est\u00e1 parcheado en la versi\u00f3n 3.5.1.&#xa0;La correcci\u00f3n fue realizada usando https://github.com/mattermost/xml-roundtrip-validator si la actualizaci\u00f3n a la versi\u00f3n 3.5.1 no es posible, los usuarios deben deshabilitar la autenticaci\u00f3n SSO en Fleet"}], "id": "CVE-2020-26276", "lastModified": "2026-06-17T03:07:58.797", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-12-17T20:15:13.760", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/mattermost/xml-roundtrip-validator"}, {"source": "security-advisories@github.com", "tags": ["Not Applicable", "Third Party Advisory"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/mattermost/xml-roundtrip-validator"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Not Applicable", "Third Party Advisory"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-290"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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