{
  "schema_version": "1.3.1",
  "id": "GO-2020-0019",
  "modified": "0001-01-01T00:00:00Z",
  "published": "2021-04-14T20:04:52Z",
  "aliases": [
    "CVE-2020-27813",
    "GHSA-3xh2-74w9-5vxm",
    "GHSA-jf24-p9p9-4rjh"
  ],
  "summary": "Integer overflow in github.com/gorilla/websocket",
  "details": "An attacker can craft malicious WebSocket frames that cause an integer overflow in a variable which tracks the number of bytes remaining. This may cause the server or client to get stuck attempting to read frames in a loop, which can be used as a denial of service vector.",
  "affected": [
    {
      "package": {
        "name": "github.com/gorilla/websocket",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.1"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/gorilla/websocket",
            "symbols": [
              "Conn.Close",
              "Conn.NextReader",
              "Conn.NextWriter",
              "Conn.ReadJSON",
              "Conn.ReadMessage",
              "Conn.WriteControl",
              "Conn.WriteJSON",
              "Conn.WriteMessage",
              "Conn.WritePreparedMessage",
              "Conn.advanceFrame",
              "Dialer.Dial",
              "Dialer.DialContext",
              "NewClient",
              "NewPreparedMessage",
              "ReadJSON",
              "Subprotocols",
              "Upgrade",
              "Upgrader.Upgrade",
              "WriteJSON",
              "flateReadWrapper.Read",
              "flateWriteWrapper.Close",
              "flateWriteWrapper.Write",
              "httpProxyDialer.Dial",
              "messageReader.Read",
              "messageWriter.Close",
              "messageWriter.ReadFrom",
              "messageWriter.Write",
              "messageWriter.WriteString",
              "netDialerFunc.Dial",
              "proxy_direct.Dial",
              "proxy_envOnce.Get",
              "proxy_socks5.Dial",
              "truncWriter.Write"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/gorilla/websocket/pull/537"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gorilla/websocket/commit/5b740c29263eb386f33f265561c8262522f19d37"
    }
  ],
  "credits": [
    {
      "name": "Max Justicz"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2020-0019"
  }
}