CVE-2025-14303

#!/usr/bin/env python3 """ CVE-2025-14303 PoC - DMA Memory Access via Insecure IOMMU Note: This is a conceptual PoC for educational purposes only. Requires physical access and DMA-capable hardware. """ import os import sys import struct def check_iommu_status(): """Check if IOMMU is enabled in the system""" try: with open('/sys/kernel/debug/vfio/iommu', 'r') as f: content = f.read() if 'IOMMU not enabled' in content or not content.strip(): return False return True except: # Alternative check via dmesg try: dmesg = os.popen('dmesg | grep -i iommu').read() return 'IOMMU enabled' in dmesg or 'AMD-Vi' in dmesg or 'Intel VT-d' in dmesg except: return None def dma_read_memory(address, length): """ Simulate DMA read operation (requires DMA-capable device) In real attack, this would use PCIe device with DMA capability """ print(f"[*] Attempting DMA read at physical address: 0x{address:016x}") print(f"[*] Reading {length} bytes...") # In actual implementation, this would: # 1. Use PCIe device with DMA capability # 2. Configure device to perform bus master DMA # 3. Read data from physical memory directly # This typically requires custom hardware/firmware or tools like pcileech return None def scan_physical_memory(): """ Scan physical memory for sensitive data Looking for: encryption keys, passwords, boot sectors """ print("[*] Scanning physical memory for sensitive data...") # Known memory regions to check: # - 0x00000000-0x00010000: IVT (Interrupt Vector Table) # - BIOS/UEFI region: typically 0xE0000-0xFFFFF # - ACPI tables: varies by system # - Kernel memory: typically starts at 0x100000 regions = [ (0x0, 0x10000, "Low memory / IVT"), (0x100000, 0x400000, "Early kernel memory"), ] for start, end, name in regions: print(f"[*] Checking {name}: 0x{start:08x}-0x{end:08x}") # In real attack, perform actual DMA reads here # Check for patterns indicating sensitive data pass def main(): print("="*60) print("CVE-2025-14303 - MSI IOMMU Bypass PoC") print("="*60) if os.geteuid() != 0: print("[!] This PoC requires root privileges") sys.exit(1) print("\n[*] Checking IOMMU status...") iommu_enabled = check_iommu_status() if iommu_enabled: print("[+] IOMMU is enabled - system may be protected") print("[*] However, IOMMU misconfiguration could still exist") elif iommu_enabled is False: print("[-] IOMMU is NOT enabled - vulnerable to CVE-2025-14303") print("[*] DMA-capable devices can access arbitrary physical memory") else: print("[?] Could not determine IOMMU status") print("\n[*] Note: Actual exploitation requires:") print(" - Physical access to target system") print(" - DMA-capable PCIe device (e.g., PCIe debug card, Thunderbolt device)") print(" - Tools like pcileech, Inception, or custom DMA firmware") print(" - Attack must occur before OS kernel security features load") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-14303", "sourceIdentifier": "[email protected]", "published": "2025-12-17T03:15:57.643", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Certain motherboard models developed by MSI 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": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-693"}]}], "references": [{"url": "https://csr.msi.com/global/product-security-advisories", "source": "[email protected]"}, {"url": "https://www.twcert.org.tw/en/cp-139-10577-3cd58-2.html", "source": "[email protected]"}, {"url": "https://www.twcert.org.tw/tw/cp-132-10576-0a0fd-1.html", "source": "[email protected]"}]}}