CVE-2018-18765

An exploitable arbitrary memory read vulnerability exists in the MQTT packet-parsing functionality of Cesanta Mongoose 6.13. It is a heap-based buffer over-read in mg_mqtt_next_subscribe_topic. A specially crafted MQTT SUBSCRIBE packet can cause an arbitrary out-of-bounds memory read potentially resulting in information disclosure and denial of service. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.

Date published : 2018-10-28

https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/Cesanta%20Mongoose%20MQTT%20mg_mqtt_next_subscribe_topic%20heap%20buffer%20overflow.md

So I'm about 90% certain that CVE-2018-18765 is bs and should never have been assigned a CVE. Let's look at the writeup which includes the "vulnerable" code: https://t.co/KR0Y9gxDTc

— Thracky (@thracky) November 5, 2018