CyberRota Analysis
AI-GeneratedNetty's MQTT decoder is vulnerable due to an incomplete fix that allows an attacker to exploit the `Properties Length` field, bypassing size limits and causing excessive memory and CPU consumption. By sending a `CONNECT` packet with a small `Remaining Length` and a large `Properties Length`, an unauthenticated remote attacker can trigger an OutOfMemoryError, impacting system stability. Organizations using Netty for MQTT messaging should prioritize addressing this vulnerability to prevent potential denial-of-service conditions.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.