{
  "threat_severity" : "Moderate",
  "public_date" : "2023-10-10T00:00:00Z",
  "bugzilla" : {
    "description" : "synapse: malicious ACL event can cause denial of service",
    "id" : "2243128",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2243128"
  },
  "cvss3" : {
    "cvss3_base_score" : "4.9",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
    "status" : "draft"
  },
  "cwe" : "CWE-770",
  "details" : [ "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.", "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." ],
  "statement" : "Red Hat nor Fedora ship matrix-org/Synapse",
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-45129\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-45129\nhttps://github.com/matrix-org/synapse/pull/16360\nhttps://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4\nhttps://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version" ],
  "name" : "CVE-2023-45129",
  "csaw" : false
}