CVE-2021-45938

Name of the Vulnerable Software and Affected Versions: wolfSSL wolfMQTT version 1.9

Description: The issue is a heap-based buffer overflow in the MqttClient DecodePacket function, which is called from MqttClient WaitType and MqttClient Unsubscribe.

Recommendations: For wolfSSL wolfMQTT version 1.9, consider disabling the MqttClient DecodePacket function as a temporary workaround until a patch is available. Restrict access to the MqttClient WaitType and MqttClient Unsubscribe functions to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.