CVE-2024-32977: OctoPrint Authentication Bypass via X-Forwarded-For Header when autologinLocal is enabled
Impact
OctoPrint versions up until and including 1.10.0 contain a vulnerability that allows an unauthenticated attacker to completely bypass the authentication if the autologinLocal option is enabled within config.yaml, even if they come from networks that are not configured as localNetworks, by spoofing their IP via the X-Forwarded-For header.
If autologin is not enabled, this vulnerability does not have any impact.
Patches
The vulnerability has been patched in version 1.10.1.
Workaround
Until the patch has been applied, OctoPrint administrators who have autologin enabled on their instances should disable it and/or to make the instance inaccessible from potentially hostile networks like the internet.
PoC
1. Enable the autologinAs configuration within the accessControl section in the OctoPrint yaml configuration file 2. Set your browser to add the X-Forwarded-For: 127.0.0.1 header to HTTP requests. For example, this can be done using proxy software like Burp Suite. Alternatively, there are browser extensions such as https://github.com/MisterPhilip/x-forwarded-for, but I haven't tried them. 3. Navigate to OctoPrint and note that it logs you in automatically.
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 1.10.0 contain a vulnerability that allows an unauthenticated attacker to completely bypass the authentication if the autologinLocal option is enabled within config.yaml, even if they come from networks that are not configured as localNetworks, spoofing their IP via the X-Forwarded-For header. If autologin is not enabled, this vulnerability does not have any impact. The vulnerability has been patched in version 1.10.1. Until the patch has been applied, OctoPrint administrators who have autologin enabled on their instances should disable it and/or to make the instance inaccessible from potentially hostile networks like the internet.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-32977?
CVE-2024-32977 is classified as a high severity vulnerability due to its ability to allow unauthenticated access if specific options are enabled.
How do I fix CVE-2024-32977?
To fix CVE-2024-32977, upgrade to OctoPrint version 1.10.1 or later.
Which versions of OctoPrint are affected by CVE-2024-32977?
CVE-2024-32977 affects all versions of OctoPrint up to and including 1.10.0.
What does the autologinLocal option mean in relation to CVE-2024-32977?
The autologinLocal option enables unauthenticated users to bypass login when accessing OctoPrint from local networks.
Can CVE-2024-32977 be exploited remotely?
Yes, CVE-2024-32977 can be exploited by unauthenticated attackers from non-local networks if the autologinLocal option is enabled.