cve-2023-45129
Vulnerability from cvelistv5
Published
2023-10-10 17:17
Modified
2024-08-02 20:14
Summary
matrix-synapse vulnerable to denial of service due to malicious server ACL events
Impacted products
Vendor Product Version
Show details on NVD website


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          "dateUpdated": "2024-08-02T20:14:19.828Z",
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          "shortName": "CVE"
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            "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4",
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            "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"
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            "name": "https://github.com/matrix-org/synapse/pull/16360",
            "tags": [
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            "url": "https://github.com/matrix-org/synapse/pull/16360"
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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": [
        {
          "product": "synapse",
          "vendor": "matrix-org",
          "versions": [
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              "status": "affected",
              "version": "\u003c 1.94.0"
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          "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."
        }
      ],
      "metrics": [
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          "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",
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        },
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      "source": {
        "advisory": "GHSA-5chr-wjw5-3gq4",
        "discovery": "UNKNOWN"
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      "title": "matrix-synapse vulnerable to denial of service due to malicious server ACL events"
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  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-45129",
    "datePublished": "2023-10-10T17:17:11.146Z",
    "dateReserved": "2023-10-04T16:02:46.328Z",
    "dateUpdated": "2024-08-02T20:14:19.828Z",
    "state": "PUBLISHED"
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  }
}


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