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.
Metrics
Affected Vendors & Products
References
Link | Providers |
---|---|
https://github.com/contiki-ng/contiki-ng/issues/600 |
![]() ![]() |
History
No history.

Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-05T11:37:10.864Z
Reserved: 2018-11-21T00:00:00
Link: CVE-2018-19417

No data.

Status : Modified
Published: 2018-11-21T20:29:00.307
Modified: 2024-11-21T03:57:53.160
Link: CVE-2018-19417

No data.