{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-45129", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2023-10-04T16:02:46.328Z", "datePublished": "2023-10-10T17:17:11.146Z", "dateUpdated": "2025-02-13T17:13:47.801Z"}, "containers": {"cna": {"title": "matrix-synapse vulnerable to denial of service due to malicious server ACL events", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"}, {"name": "https://github.com/matrix-org/synapse/pull/16360", "tags": ["x_refsource_MISC"], "url": "https://github.com/matrix-org/synapse/pull/16360"}, {"name": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version", "tags": ["x_refsource_MISC"], "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B/"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/"}, {"url": "https://security.gentoo.org/glsa/202401-12"}], "affected": [{"vendor": "matrix-org", "product": "synapse", "versions": [{"version": "< 1.94.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2024-01-07T11:08:07.295Z"}, "descriptions": [{"lang": "en", "value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API."}], "source": {"advisory": "GHSA-5chr-wjw5-3gq4", "discovery": "UNKNOWN"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T20:14:19.828Z"}, "title": "CVE Program Container", "references": [{"name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4", "tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"}, {"name": "https://github.com/matrix-org/synapse/pull/16360", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/matrix-org/synapse/pull/16360"}, {"name": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/", "tags": ["x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B/", "tags": ["x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/", "tags": ["x_transferred"]}, {"url": "https://security.gentoo.org/glsa/202401-12", "tags": ["x_transferred"]}]}]}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*", "matchCriteriaId": "3493E32E-7CAA-4B40-9763-DA34F4209328", "versionEndExcluding": "1.94.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*", "matchCriteriaId": "E30D0E6F-4AE8-4284-8716-991DFA48CC5D", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*", "matchCriteriaId": "CC559B26-5DFC-4B7A-A27C-B77DE755DFF9", "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. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API."}, {"lang": "es", "value": "Synapse es un servidor dom\u00e9stico Matrix de c\u00f3digo abierto escrito y mantenido por la Fundaci\u00f3n Matrix.org. Antes de la versi\u00f3n 1.94.0, un evento de ACL de servidor malicioso pod\u00eda afectar el rendimiento de forma temporal o permanente y provocar una denegaci\u00f3n de servicio persistente. Los servidores dom\u00e9sticos que se ejecutan en una federaci\u00f3n cerrada (que presumiblemente no necesitan usar ACL de servidor) no se ven afectados. Se recomienda a los administradores del servidor que actualicen a Synapse 1.94.0 o posterior. Como workaround, las salas con eventos de ACL de servidor maliciosos se pueden eliminar y bloquear mediante la API de administraci\u00f3n."}], "id": "CVE-2023-45129", "lastModified": "2024-11-21T08:26:24.017", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2023-10-10T18:15:19.093", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/matrix-org/synapse/pull/16360"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B/"}, {"source": "security-advisories@github.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/"}, {"source": "security-advisories@github.com", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"}, {"source": "security-advisories@github.com", "url": "https://security.gentoo.org/glsa/202401-12"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/matrix-org/synapse/pull/16360"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes"], "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/202401-12"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

{"bugzilla": {"description": "synapse: malicious ACL event can cause denial of service", "id": "2243128", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2243128"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API."], "name": "CVE-2023-45129", "public_date": "2023-10-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-45129\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-45129\nhttps://github.com/matrix-org/synapse/pull/16360\nhttps://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4\nhttps://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"], "statement": "Red Hat nor Fedora ship matrix-org/Synapse", "threat_severity": "Moderate", "upstream_fix": "synapse 1.94.0"}