CVE-2018-19417

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.

Score

CVSS 3.0 10.0 Critical

Status

Modified - cve@mitre.org

Published

2018-11-21

Last modified

2024-08-05

Weaknesses

CWE-119

Affected products

• Contiki-ng (Contiki-ng)

References

• https://github.com/contiki-ng/contiki-ng/issues/600