CVE Published: 27/12/2022 |
CVE Updated: 03/08/2024 |
CVE Year: 2021 Source: Go |
Vendor: github.com/flynn/noise |
Product: github.com/flynn/noise Status : PUBLISHED
CVE-2021-4239 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.