{"containers": {"cna": {"affected": [{"product": "synapse", "vendor": "matrix-org", "versions": [{"status": "affected", "version": "< 1.62.0"}]}], "descriptions": [{"lang": "en", "value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-703", "description": "CWE-703: Improper Check or Handling of Exceptional Conditions", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-09-02T20:00:16", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/matrix-org/synapse/pull/13087"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/matrix-org/synapse/pull/13088"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/matrix-org/synapse/releases/tag/v1.62.0"}], "source": {"advisory": "GHSA-jhjh-776m-4765", "discovery": "UNKNOWN"}, "title": "Synapse vulnerable to denial of service (DoS) due to incorrect application of event authorization rules", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2022-31152", "STATE": "PUBLIC", "TITLE": "Synapse vulnerable to denial of service (DoS) due to incorrect application of event authorization rules"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "synapse", "version": {"version_data": [{"version_value": "< 1.62.0"}]}}]}, "vendor_name": "matrix-org"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround."}]}, "impact": {"cvss": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-703: Improper Check or Handling of Exceptional Conditions"}]}]}, "references": {"reference_data": [{"name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765", "refsource": "CONFIRM", "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765"}, {"name": "https://github.com/matrix-org/synapse/pull/13087", "refsource": "MISC", "url": "https://github.com/matrix-org/synapse/pull/13087"}, {"name": "https://github.com/matrix-org/synapse/pull/13088", "refsource": "MISC", "url": "https://github.com/matrix-org/synapse/pull/13088"}, {"name": "https://github.com/matrix-org/synapse/releases/tag/v1.62.0", "refsource": "MISC", "url": "https://github.com/matrix-org/synapse/releases/tag/v1.62.0"}]}, "source": {"advisory": "GHSA-jhjh-776m-4765", "discovery": "UNKNOWN"}}}}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2022-31152", "datePublished": "2022-09-02T20:00:16", "dateReserved": "2022-05-18T00:00:00", "dateUpdated": "2022-09-02T20:00:16", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.0"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*", "matchCriteriaId": "EB9911C4-B127-4218-9B50-D109E9C5C144", "versionEndExcluding": "1.62.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of [event authorization rules](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting [`federation_domain_whitelist`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround."}, {"lang": "es", "value": "Synapse es un servidor dom\u00e9stico de Matrix de c\u00f3digo abierto escrito y mantenido por la Fundaci\u00f3n Matrix.org. La especificaci\u00f3n de Matrix especifica una lista de [reglas de autorizaci\u00f3n de eventos](https://spec.matrix.org/v1.2/rooms/v9/#authorization-rules) que deben ser comprobadas cuando es determinado si un evento debe ser aceptado en una sala. En las versiones de Synapse hasta 1.61.0 incluy\u00e9ndola, algunas de estas reglas no son aplicadas correctamente. Un atacante podr\u00eda dise\u00f1ar eventos que ser\u00edan aceptados por Synapse pero no por un servidor conforme a las especificaciones, causando potencialmente una divergencia en el estado de la sala entre los servidores. Es recomendado a administradores de servidores dom\u00e9sticos con la federaci\u00f3n activada que actualicen a versi\u00f3n 1.62.0 o superior. La federaci\u00f3n puede ser deshabilitada al establecer [\"federation_domain_whitelist\"](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) a una lista vac\u00eda (\"[]\") como una mitigaci\u00f3n"}], "id": "CVE-2022-31152", "lastModified": "2022-09-09T03:21:59.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2022-09-02T20:15:08.370", "references": [{"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/matrix-org/synapse/pull/13087"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/matrix-org/synapse/pull/13088"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/matrix-org/synapse/releases/tag/v1.62.0"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Mitigation", "Third Party Advisory"], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-703"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}