{
    "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": "2024-08-02T20:14:19.828Z"
    },
    "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": "2023-10-10T17:17:11.146Z"
            },
            "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"
                        ]
                    }
                ]
            }
        ]
    }
}