VAR-201811-0516

Vulnerability from variot - Updated: 2024-11-23 22:45

An issue was discovered in the MQTT server in Contiki-NG before 4.2. The function parse_publish_vhdr() that parses MQTT PUBLISH messages with a variable length header uses memcpy to input data into a fixed size buffer. The allocated buffer can fit only MQTT_MAX_TOPIC_LENGTH (default 64) bytes, and a length check is missing. This could lead to Remote Code Execution via a stack-smashing attack (overwriting the function return address). Contiki-NG does not separate the MQTT server from other servers and the OS modules, so access to all memory regions is possible. Contiki-NG Contains a buffer error vulnerability.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. Contiki-NG is an open source cross-platform operating system for the next generation of IoT devices. MQTT Server is one of the message queue transfer servers.

Contiki-NG MQTT servers prior to 4.2 have a stack-based buffer overflow vulnerability. An attacker could use this vulnerability to execute code

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