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        "providerMetadata": {
          "dateUpdated": "2024-08-02T19:52:11.374Z",
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            "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575",
            "tags": [
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            "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575"
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            "name": "https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f",
            "tags": [
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            "url": "https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/"
          },
          {
            "tags": [
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            "url": "https://security.gentoo.org/glsa/202401-12"
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        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
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          "product": "synapse",
          "vendor": "matrix-org",
          "versions": [
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              "version": "\u003c 1.95.1"
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      "descriptions": [
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          "lang": "en",
          "value": "Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
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          "descriptions": [
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              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
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          "url": "https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/"
        },
        {
          "url": "https://security.gentoo.org/glsa/202401-12"
        }
      ],
      "source": {
        "advisory": "GHSA-mp92-3jfm-3575",
        "discovery": "UNKNOWN"
      },
      "title": "Synapse vulnerable to leak of remote user device information"
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  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-43796",
    "datePublished": "2023-10-31T16:52:48.505Z",
    "dateReserved": "2023-09-22T14:51:42.339Z",
    "dateUpdated": "2025-02-13T17:13:30.615Z",
    "state": "PUBLISHED"
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