{
  "schema_version": "1.3.1",
  "id": "GO-2022-0952",
  "modified": "0001-01-01T00:00:00Z",
  "published": "2022-08-22T18:08:50Z",
  "aliases": [
    "CVE-2022-36009",
    "GHSA-grvv-h2f9-7v9c"
  ],
  "summary": "Incorrect event parsing in github.com/matrix-org/gomatrixserverlib",
  "details": "Power level parsing does not parse the \"events_default\" key of the m.room.power_levels event, setting the event default power level to zero in all cases. This can cause events to be improperly accepted or rejected in rooms where the event_default power level has been changed.",
  "affected": [
    {
      "package": {
        "name": "github.com/matrix-org/gomatrixserverlib",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20220815091947-723fd495dde8"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/matrix-org/gomatrixserverlib",
            "symbols": [
              "Allowed",
              "Event.PowerLevels",
              "EventsLoader.LoadAndVerify",
              "HeaderedReverseTopologicalOrdering",
              "NewPowerLevelContentFromAuthEvents",
              "NewPowerLevelContentFromEvent",
              "RequestBackfill",
              "ResolveConflicts",
              "ResolveStateConflicts",
              "ResolveStateConflictsV2",
              "RespSendJoin.Check",
              "RespState.Check",
              "RespState.Events",
              "ReverseTopologicalOrdering",
              "VerifyAuthRulesAtState",
              "VerifyEventAuthChain"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/matrix-org/gomatrixserverlib/commit/723fd495dde835d078b9f2074b6b62c06dea4575"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2022-0952"
  }
}