{
  "id": "CVE-2023-32323",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2023-05-26T14:15:10.827",
  "lastModified": "2023-09-18T04:15:09.300",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized `invite_room_state` fields. Server operators should upgrade to Synapse 1.74 or newer urgently.\n\n"
    },
    {
      "lang": "es",
      "value": "Synapse es un servidor dom\u00e9stico Matrix de c\u00f3digo abierto escrito y mantenido por la Fundaci\u00f3n Matrix.org. Un usuario malicioso en un servidor dom\u00e9stico X de Synapse con permiso para crear ciertos eventos de estado puede deshabilitar la federaci\u00f3n saliente de X a un servidor dom\u00e9stico Y arbitrario. Las instancias de Synapse con la federaci\u00f3n deshabilitada no se ven afectadas. En las versiones de Synapse hasta la 1.73 inclusive, Synapse no limitaba el tama\u00f1o de `invite_room_state`, lo que significa que era posible crear un evento de invitaci\u00f3n arbitrariamente grande. Synapse 1.74 se niega a crear campos `invite_room_state` de gran tama\u00f1o. Los operadores de servidores deben actualizar urgentemente a Synapse 1.74 o posterior."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      },
      {
        "source": "security-advisories@github.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW",
          "baseScore": 5.0,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 1.4
      }
    ]
  },
  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.74.0",
              "matchCriteriaId": "D7B262AE-3361-41B7-8BF8-D893316A98C4"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/matrix-org/synapse/issues/14492",
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ]
    },
    {
      "url": "https://github.com/matrix-org/synapse/pull/14642",
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-f3wc-3vxv-xmvr",
      "source": "security-advisories@github.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD/",
      "source": "security-advisories@github.com"
    }
  ]
}