CVE-2023-41047: Improper Neutralization of Special Elements Used in a Template Engine in OctoPrint
Impact
OctoPrint versions up until and including 1.9.2 contain a vulnerability that allows malicious admins to configure a specially crafted GCODE script through the Settings that will allow code execution during rendering of that script.
An attacker might use this to extract data managed by OctoPrint, or manipulate data managed by OctoPrint, as well as execute arbitrary commands with the rights of the OctoPrint process on the server system.
Please note that GCODE files uploaded to be printed are not affected! This vulnerability exclusively affects GCODE Scripts to be executed on connection to the printer, print pause, resume etc, as described in the documentation, to be found under Settings > GCODE Scripts and configurable only by users with the ADMIN permission.
Patches
The vulnerability has been patched in version 1.9.3.
Workarounds
OctoPrint administrators are strongly advised to thoroughly vet who has admin access to their installation and to not blindly configure arbitrary GCODE scripts found online or provided to them by third parties.
Credits
This vulnerability was discovered and responsibly disclosed to OctoPrint by tianxin Wu (Bearcat), Vulnerability Researcher at Numen Cyber Labs, Singapore.
Other sources
OctoPrint is a web interface for 3D printers. OctoPrint versions up until and including 1.9.2 contain a vulnerability that allows malicious admins to configure a specially crafted GCODE script that will allow code execution during rendering of that script. An attacker might use this to extract data managed by OctoPrint, or manipulate data managed by OctoPrint, as well as execute arbitrary commands with the rights of the OctoPrint process on the server system. OctoPrint versions from 1.9.3 onward have been patched. Administrators of OctoPrint instances are advised to make sure they can trust all other administrators on their instance and to also not blindly configure arbitrary GCODE scripts found online or provided to them by third parties.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2023-41047?
CVE-2023-41047 is a vulnerability in OctoPrint versions up until and including 1.9.2 that allows malicious admins to execute code during rendering of GCODE scripts.
How does CVE-2023-41047 impact OctoPrint?
CVE-2023-41047 allows malicious admins to configure a specially crafted GCODE script through the Settings, resulting in code execution during rendering.
What is the severity of CVE-2023-41047?
CVE-2023-41047 has a severity rating of medium, with a CVSS score of 6.2.
Is CVE-2023-41047 fixed in OctoPrint?
Yes, CVE-2023-41047 is fixed in OctoPrint version 1.9.3.
How can I fix CVE-2023-41047 in OctoPrint?
To fix CVE-2023-41047, update your OctoPrint installation to version 1.9.3 or later.