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.
Metrics
Affected Vendors & Products
References
History
Mon, 14 Apr 2025 17:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
|

Status: PUBLISHED
Assigner: Go
Published:
Updated: 2025-04-14T16:59:43.688Z
Reserved: 2022-07-29T20:06:51.345Z
Link: CVE-2021-4239

Updated: 2024-08-03T17:23:10.118Z

Status : Modified
Published: 2022-12-27T22:15:12.123
Modified: 2025-04-14T17:15:24.963
Link: CVE-2021-4239

No data.