cvelist/2023/45xxx/CVE-2023-45129.json

{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-45129",
        "ASSIGNER": "security-advisories@github.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "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."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-770: Allocation of Resources Without Limits or Throttling",
                        "cweId": "CWE-770"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "matrix-org",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "synapse",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "< 1.94.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4",
                "refsource": "MISC",
                "name": "https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4"
            },
            {
                "url": "https://github.com/matrix-org/synapse/pull/16360",
                "refsource": "MISC",
                "name": "https://github.com/matrix-org/synapse/pull/16360"
            },
            {
                "url": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version",
                "refsource": "MISC",
                "name": "https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-5chr-wjw5-3gq4",
        "discovery": "UNKNOWN"
    },
    "impact": {
        "cvss": [
            {
                "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"
            }
        ]
    }
}