CVE-2020-27847

{"containers": {"cna": {"affected": [{"product": "dexidp/dex", "vendor": "n/a", "versions": [{"status": "affected", "version": "dex 2.27.0"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-228", "description": "CWE-228->CWE-290", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-05-28T10:20:35.000Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"}, {"tags": ["x_refsource_MISC"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "secalert@redhat.com", "ID": "CVE-2020-27847", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "dexidp/dex", "version": {"version_data": [{"version_value": "dex 2.27.0"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-228->CWE-290"}]}]}, "references": {"reference_data": [{"name": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/", "refsource": "MISC", "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"}, {"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732", "refsource": "MISC", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732"}, {"name": "https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5", "refsource": "MISC", "url": "https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T16:25:43.583Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2020-27847", "datePublished": "2021-05-28T10:20:35.000Z", "dateReserved": "2020-10-27T00:00:00.000Z", "dateUpdated": "2024-08-04T16:25:43.583Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "dexidp/dex", "vendor": "n/a", "versions": [{"status": "affected", "version": "dex 2.27.0"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:dex:*:*:*:*:*:*:*:*", "matchCriteriaId": "6DED3272-1D65-4A06-97D5-73FC7EE37516", "versionEndExcluding": "2.27.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0."}, {"lang": "es", "value": "Se presenta una vulnerabilidad en el conector SAML de la biblioteca github.com/dexidp/dex que es usado para procesar la comprobaci\u00f3n de firma SAML. Este fallo permite a un atacante omitir la autenticaci\u00f3n SAML. La mayor amenaza de esta vulnerabilidad es la confidencialidad, la integridad y la disponibilidad del sistema. Este fallo afecta a dex versiones anteriores a 2.27.0"}], "id": "CVE-2020-27847", "lastModified": "2026-06-17T03:09:44.013", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "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": 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": "2021-05-28T11:15:07.703", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-228"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"bugzilla": {"description": "dexidp/dex: authentication bypass in saml authentication", "id": "1907732", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907732"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-228->CWE-290", "details": ["A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0.", "A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."], "name": "CVE-2020-27847", "package_state": [{"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Will not fix", "impact": "low", "package_name": "rhacm2/observatorium-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}], "public_date": "2020-12-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-27847\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-27847\nhttps://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5\nhttps://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"], "statement": "Red Hat Advanced Cluster Management for Kubernetes 2.1 packages the dexidp/dex library in observatorium-container for use in testing. In production, this library and its functionality are not used, and can not be reached by an attacker. Thus, the severity of this vulnerability has been downgraded for this product. A future update will remove this dependency.", "threat_severity": "Critical"}

{}