CVE-2026-21986: Oracle VM VirtualBox Core组件拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2026-21986 PoC - Oracle VM VirtualBox Local DoS Note: This is a conceptual PoC for vulnerability detection Actual exploitation requires specific trigger conditions """ import subprocess import sys import os def check_virtualbox_version(): """Check if VirtualBox is installed and get version""" try: result = subprocess.run(['VBoxManage', '--version'], capture_output=True, text=True, timeout=5) if result.returncode == 0: version = result.stdout.strip() print(f"[*] VirtualBox Version: {version}") return version else: print("[-] VirtualBox not found or not accessible") return None except Exception as e: print(f"[-] Error checking VirtualBox: {e}") return None def list_virtual_machines(): """List all registered VirtualBox VMs""" try: result = subprocess.run(['VBoxManage', 'list', 'vms'], capture_output=True, text=True, timeout=5) if result.returncode == 0: vms = result.stdout.strip().split('\n') print(f"[*] Found {len(vms)} Virtual Machine(s)") for vm in vms: if vm: print(f" {vm}") return vms except Exception as e: print(f"[-] Error listing VMs: {e}") return [] def check_vm_status(vm_name): """Check specific VM running status""" try: result = subprocess.run(['VBoxManage', 'showvminfo', vm_name, '--machinereadable'], capture_output=True, text=True, timeout=10) if result.returncode == 0: for line in result.stdout.split('\n'): if line.startswith('VMState='): state = line.split('=')[1].strip('"') print(f"[*] VM '{vm_name}' State: {state}") return state except Exception as e: print(f"[-] Error checking VM status: {e}") return None def detect_vulnerability(version): """Detect if VirtualBox version is vulnerable to CVE-2026-21986""" vulnerable_versions = ['7.1.14', '7.2.4'] if version: # Extract version number main_version = '.'.join(version.split('.')[:2]) if main_version in vulnerable_versions: print(f"[!] VULNERABLE: Version {version} is affected by CVE-2026-21986") print("[!] This vulnerability allows local attackers to cause DoS") print("[!] Only affects Windows virtual machines") return True else: print(f"[*] Version {version} may not be affected") return False return None def main(): print("="*60) print("CVE-2026-21986 Vulnerability Checker") print("Oracle VM VirtualBox Core DoS Vulnerability") print("="*60) # Check VirtualBox installation version = check_virtualbox_version() if not version: print("[-] VirtualBox not installed or not in PATH") sys.exit(1) # List VMs vms = list_virtual_machines() # Check vulnerability status is_vulnerable = detect_vulnerability(version) # Check running VMs status if vms: print("\n[*] Checking VM statuses...") for vm_line in vms: if vm_line: vm_name = vm_line.split('"')[1] check_vm_status(vm_name) print("\n[*] Remediation: Upgrade to latest VirtualBox version") print("[*] Reference: https://www.oracle.com/security-alerts/cpujan2026.html") if __name__ == "__main__": main()