This project is a work-in-progress tool designed to detect potential vulnerabilities in CUPS (Common Unix Printing System), specifically those related to CVE-2024-47176 and associated issues in cups-browsed and IPP handling. It's based on the research detailed in the blog post Attacking UNIX Systems via CUPS, Part I.
- Discovers printers on the local network using Zeroconf
- Sends specially crafted UDP packets to port 631
- Probes for IPP (Internet Printing Protocol) information
- Checks for CUPS-specific indicators in IPP responses
- Examines printer web interfaces for CUPS references
- This tool is for detection only and does not attempt exploitation
- It cannot definitively confirm the presence of vulnerabilities, only potential indicators
- The script doesn't check all components mentioned in the original vulnerability report
- Detection methods may produce false positives or negatives
- The tool doesn't currently check for zeroconf/mDNS vulnerabilities mentioned in the original report
python3 discover.py <printer_ip>
or
python3 discover.py discover
- Python 3.x
- Required Python packages:
requests,zeroconf
To install the required packages, run:
pip install -r requirements.txt
This tool is for educational and research purposes only. Always obtain proper authorization before scanning any networks or systems you do not own or have explicit permission to test.
This is a work-in-progress project, and community input is highly valued and encouraged. If you have suggestions for improvements, additional detection methods, or bug fixes, please feel free to:
- Open an issue to discuss proposed changes
- Submit a pull request with your improvements
- Share your experiences and findings using this tool
We're particularly interested in:
- Improving detection accuracy
- Expanding the range of CUPS-related vulnerabilities detected
- Enhancing the tool's performance and reliability
- Adding support for different environments and CUPS versions
The following are areas that could potentially enhance the capabilities of this tool:
- More comprehensive checks for all components mentioned in the vulnerability breakdown (cups-browsed, libppd, cups-filters).
- Methods to safely detect the potential for malicious IPP attribute processing and command execution without actual exploitation.
- Addition of references to specific vulnerable code sections as identified in the GitHub links provided in the vulnerability report.
- Improved detection mechanisms for systems that may be vulnerable but do not respond to current probing methods.
Note: These are suggestions for possible improvements and do not represent committed future work or guaranteed updates to the tool.
MIT
This project is based on the research by Simone Margaritelli (evilsocket) as detailed in their blog post "Attacking UNIX Systems via CUPS, Part I". We thank them for their valuable contribution to the security community.