CVE-2018-19417: Buffer Overflow
An issue was discovered in the MQTT server in Contiki-NG before 4.2. The function parsepublishvhdr() 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 MQTTMAXTOPICLENGTH (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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2018-19417?
CVE-2018-19417 is an issue with the MQTT server in Contiki-NG before version 4.2 that allows for a buffer overflow vulnerability.
How severe is CVE-2018-19417?
CVE-2018-19417 is considered as critical with a severity value of 10.
What software is affected by CVE-2018-19417?
Contiki-NG versions up to, but excluding 4.2, are affected by CVE-2018-19417.
How can I fix CVE-2018-19417?
To fix CVE-2018-19417, it is recommended to update Contiki-NG to version 4.2 or later.
Where can I find more information about CVE-2018-19417?
More information about CVE-2018-19417 can be found at the following link: [GitHub Issue](https://github.com/contiki-ng/contiki-ng/issues/600).