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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2018-11-21T19:00:00

Updated: 2024-08-05T11:37:10.864Z

Reserved: 2018-11-21T00:00:00

Link: CVE-2018-19417

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2018-11-21T20:29:00.307

Modified: 2019-02-04T18:19:13.953

Link: CVE-2018-19417

cve-icon Redhat

No data.