{"schema_version":"1.3.1","id":"GO-2022-0425","modified":"2024-05-20T16:03:47Z","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","review_status":"REVIEWED"}}