CVE-2023-41047 - OctoPrint Vulnerability Allows Code Execution Through Specially Crafted GCODE Scripts

OctoPrint is a popular web interface for 3D printers that allows users to remotely manage and control their 3D printers. Recently, a vulnerability (identified as CVE-2023-41047) has been discovered in OctoPrint versions up until and including 1.9.2 which put users at risk by allowing malicious admins to configure a specially crafted GCODE script to execute code during the rendering of that script. This could potentially enable an attacker to extract or manipulate data managed by OctoPrint or execute arbitrary commands with the rights of the OctoPrint process on the server system.

Exploit Details

The vulnerability exists because OctoPrint does not properly sanitize and validate user input in GCODE script configurations. This allows a malicious admin to create a GCODE script containing arbitrary code that can be executed during the rendering of the GCODE script.

Here is an example of a specially crafted GCODE script that could exploit the vulnerability

; Start GCODE Script
G28 ; Home all axes
G29 ; Perform auto bed leveling
G92 E ; Reset extruder position
{arbitrary_code_here} ; Malicious code to be executed
G1 E5 F200 ; Prime nozzle
G1 Z.3 ; Move nozzle closer to the bed
; End GCODE Script

By injecting arbitrary code within the GCODE script, an attacker could potentially access sensitive information, tamper with existing data, or execute system commands.

Original References

- OctoPrint official documentation
- OctoPrint GitHub repository
- CVE-2023-41047 vulnerability report

Patch and Recommendations

The vulnerability has been patched in OctoPrint version 1.9.3 and onward. It is highly recommended for users to update their OctoPrint instances to the latest version available.

Ensure that they trust all other administrators on their instance.

2. Be cautious and avoid configuring arbitrary GCODE scripts found online or provided to them by third parties.

It is essential to always keep software up-to-date and apply security best practices to protect your server systems and sensitive data from potential exploits. Stay vigilant and stay safe!

Timeline

Published on: 10/09/2023 16:15:10 UTC
Last modified on: 10/13/2023 18:40:38 UTC