{
  "schema_version": "1.3.1",
  "id": "GO-2022-0425",
  "modified": "0001-01-01T00:00:00Z",
  "published": "2022-02-15T01:57:18Z",
  "aliases": [
    "CVE-2021-4239",
    "GHSA-6cr6-fmvc-vw2p",
    "GHSA-g9mp-8g3h-3c5c"
  ],
  "summary": "Weak encryption and denial of service in github.com/flynn/noise",
  "details": "The Noise protocol implementation suffers from weakened cryptographic security after encrypting 2^64 messages, and a potential denial of service attack.\n\nAfter 2^64 (~18.4 quintillion) messages are encrypted with the Encrypt function, the nonce counter will wrap around, causing multiple messages to be encrypted with the same key and nonce.\n\nIn a separate issue, the Decrypt function increments the nonce state even when it fails to decrypt a message. If an attacker can provide an invalid input to the Decrypt function, this will cause the nonce state to desynchronize between the peers, resulting in a failure to encrypt all subsequent messages.",
  "affected": [
    {
      "package": {
        "name": "github.com/flynn/noise",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "github.com/flynn/noise",
            "symbols": [
              "CipherState.Decrypt",
              "CipherState.Encrypt",
              "HandshakeState.ReadMessage",
              "HandshakeState.WriteMessage",
              "symmetricState.DecryptAndHash",
              "symmetricState.EncryptAndHash"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/flynn/noise/pull/44"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2022-0425"
  }
}