CVE-2024-49377: Jinja2 Templates are vulnerable to XSS attacks due to their configuration in OctoPrint
Impact
OctoPrint versions up until and including 1.10.2 are vulnerable to reflected XSS vulnerabilities through its Jinja2 template system, as this is not configured to enforce automatic escaping. This affects, among other places, the login dialog and the standalone application key confirmation dialog.
An attacker who successfully talked a victim into clicking on or through a malicious third party app successfully redirected a victim to a specially crafted link could use this to retrieve or modify sensitive configuration settings, interrupt prints or otherwise interact with the OctoPrint instance in a malicious way.
Patches
The above mentioned specific vulnerabilities of the login dialog and the standalone application key confirmation dialog will be patched in the bugfix release 1.10.3 by individual escaping of the detected locations. A global change throughout all of OctoPrint's templating system with the upcoming 1.11.0 release will handle this further, switching to globally enforced automatic escaping and thus reducing the attack surface in general.
The latter will also improve the security of third party plugins. During a transition period, third party plugins will be able to opt into the automatic escaping. With OctoPrint 1.13.0, automatic escaping will be switched over to be enforced even for third party plugins, unless they explicitly opt-out.
Credits
This vulnerability was discovered and responsibly disclosed to OctoPrint by Jacopo Tediosi.
Other sources
OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up until and including 1.10.2 contain reflected XSS vulnerabilities in the login dialog and the standalone application key confirmation dialog. An attacker who successfully talked a victim into clicking on a specially crafted login link, or a malicious app running on a victim's computer triggering the application key workflow with specially crafted parameters and then redirecting the victim to the related standalone confirmation dialog could use this to retrieve or modify sensitive configuration settings, interrupt prints or otherwise interact with the OctoPrint instance in a malicious way. The above mentioned specific vulnerabilities of the login dialog and the standalone application key confirmation dialog have been patched in the bugfix release 1.10.3 by individual escaping of the detected locations. A global change throughout all of OctoPrint's templating system with the upcoming 1.11.0 release will handle this further, switching to globally enforced automatic escaping and thus reducing the attack surface in general. The latter will also improve the security of third party plugins. During a transition period, third party plugins will be able to opt into the automatic escaping. With OctoPrint 1.13.0, automatic escaping will be switched over to be enforced even for third party plugins, unless they explicitly opt-out.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2024-49377?
CVE-2024-49377 is classified as a reflected XSS vulnerability, which can lead to unauthorized actions on behalf of the user.
How do I fix CVE-2024-49377?
To fix CVE-2024-49377, upgrade OctoPrint to version 1.10.3 or higher.
What versions of OctoPrint are affected by CVE-2024-49377?
CVE-2024-49377 affects all versions of OctoPrint up to and including 1.10.2.
What kind of attack can CVE-2024-49377 lead to?
CVE-2024-49377 can lead to reflected XSS attacks that may compromise user data and session integrity.
What components of OctoPrint are impacted by CVE-2024-49377?
CVE-2024-49377 impacts the Jinja2 template system, particularly affecting the login dialog and standalone application.