CVE-2020-10071CWE-120CWE-129

Insufficient publish message length validation in MQTT

Critical · published June 5, 2020

CVSS v3.1
9.0
EPSS
3%
Percentile
88.8
In the wild
Unconfirmed
What it is

🔥 A sneaky buffer overflow in Zephyr’s MQTT parsing code could be your worst nightmare! Think of it like an overstuffed suitcase at the airport — if you cram too much in, it could burst open and spill everywhere! This flaw lets attackers push more data than the software can handle, potentially taking control of your system. This means a remote attacker could execute malicious code on the affected device, leading to full system compromise. It’s like inviting a stranger into your home while leaving the door unlocked — once they're in, they can do anything!

Put simply

Think of it like an overstuffed suitcase at the airport — if you cram too much in, it could burst open and spill everywhere! This flaw lets attackers push more data than the software can handle, potentially taking control of your system. The vulnerability arises from insufficient length checking on published messages, allowing for a buffer overflow. This can lead to remote code execution on devices running Zephyr version 2.2.0 and later.

What to do

This means a remote attacker could execute malicious code on the affected device, leading to full system compromise. It’s like inviting a stranger into your home while leaving the door unlocked — once they're in, they can do anything! To protect your systems, update to the latest version of Zephyr immediately and review your MQTT message handling code for any similar vulnerabilities. Implementing proper input validation will also go a long way in securing your applications. You've got this! With these steps, you'll be locking down your systems and keeping the bad guys out! 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.03395 · 88.8th percentile
Weaknesses
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'); CWE-129 · Improper Validation of Array Index
Published
2020-06-05T17:37Z
EPSS history
Timeline
  • 05 JUN 17:37Z
    Insufficient publish message length validation in MQTT
    cvelistv5