{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "matrix-synapse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.33.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-19T19:34:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nMissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion.\n\n### Patches\nThe issue is fixed by https://github.com/matrix-org/synapse/pull/9855.\n\n### Workarounds\nThere are no known workarounds.\n\n### References\nn/a\n\n### For more information\nIf you have any questions or comments about this advisory, email us at security@matrix.org.\n",
  "id": "GHSA-7h5v-85w9-pq6c",
  "modified": "2021-05-19T19:34:56Z",
  "published": "2021-05-19T23:01:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/security/advisories/GHSA-7h5v-85w9-pq6c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/synapse/pull/9855"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Denial of service (via resource exhaustion) due to improper input validation in third-party identifier endpoint"
}