CVE-2018-18765 — CRITICAL (9.1)

Vulnerability Description

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.

CVSS Score

9.1

CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cesanta	Mongoose	6.13

Related Weaknesses (CWE)

CWE-125

References

https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/CesantaExploitThird Party Advisory
https://twitter.com/thracky/status/1059472674940993541Third Party Advisory
https://github.com/TiffanyBlue/PoCbyMyself/blob/master/mongoose6.13/mqtt/CesantaExploitThird Party Advisory
https://twitter.com/thracky/status/1059472674940993541Third Party Advisory

FAQ

What is CVE-2018-18765?

CVE-2018-18765 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 spec...

How severe is CVE-2018-18765?

CVE-2018-18765 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2018-18765?

Check the references section above for vendor advisories and patch information. Affected products include: Cesanta Mongoose.