packages:
  - module: github.com/flynn/noise
    symbols:
      - CipherState.Encrypt
      - CipherState.Decrypt
      - symmetricState.EncryptAndHash
    derived_symbols:
      - HandshakeState.ReadMessage
      - HandshakeState.WriteMessage
      - symmetricState.DecryptAndHash
    versions:
      - fixed: 1.0.0
    vulnerable_at: 0.0.0-20210422170017-fc2bb37e287b
description: |
    The Noise protocol implementation suffers from weakened
    cryptographic security after encrypting 2^64 messages, and a
    potential denial of service attack.

    After 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.

    In 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.
published: 2022-02-15T01:57:18Z
last_modified: 2022-04-12T22:48:22Z
ghsas:
  - GHSA-g9mp-8g3h-3c5c
links:
    pr: https://github.com/flynn/noise/pull/44