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fix bugs with admin rights and pipe connection, plus some refactors

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This commit is contained in:
Akash Mozumdar 2019-02-16 22:51:10 -05:00
parent 8e40c71563
commit c9a7a606cb
7 changed files with 58 additions and 71 deletions
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17
GUI/host/host.cpp
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@ -33,8 +33,9 @@ namespace
}
template <typename T>
std::enable_if_t<sizeof(T) < PIPE_BUFFER_SIZE> Send(T data)
void Send(T data)
{
static_assert(sizeof(data) < PIPE_BUFFER_SIZE);
std::thread([=]
{
DWORD DUMMY;
@ -75,15 +76,12 @@ namespace
{
std::thread([]
{
SECURITY_DESCRIPTOR pipeSD = {};
InitializeSecurityDescriptor(&pipeSD, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&pipeSD, TRUE, NULL, FALSE); // Allow non-admin processes to connect to pipe created by admin host
SECURITY_ATTRIBUTES pipeSA = { sizeof(pipeSA), &pipeSD, FALSE };
struct PipeCloser { void operator()(HANDLE h) { DisconnectNamedPipe(h); CloseHandle(h); } };
AutoHandle<PipeCloser>
hookPipe = CreateNamedPipeW(HOOK_PIPE, PIPE_ACCESS_INBOUND, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE, PIPE_UNLIMITED_INSTANCES, 0, PIPE_BUFFER_SIZE, MAXDWORD, &pipeSA),
hostPipe = CreateNamedPipeW(HOST_PIPE, PIPE_ACCESS_OUTBOUND, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE, PIPE_UNLIMITED_INSTANCES, PIPE_BUFFER_SIZE, 0, MAXDWORD, &pipeSA);
hookPipe = CreateNamedPipeW(HOOK_PIPE, PIPE_ACCESS_INBOUND, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE, PIPE_UNLIMITED_INSTANCES, 0, PIPE_BUFFER_SIZE, MAXDWORD, &allAccess),
hostPipe = CreateNamedPipeW(HOST_PIPE, PIPE_ACCESS_OUTBOUND, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE, PIPE_UNLIMITED_INSTANCES, PIPE_BUFFER_SIZE, 0, MAXDWORD, &allAccess);
static AutoHandle<> pipeAvailableEvent = CreateEventW(&allAccess, FALSE, FALSE, PIPE_AVAILABLE_EVENT);
SetEvent(pipeAvailableEvent);
ConnectNamedPipe(hookPipe, nullptr);
BYTE buffer[PIPE_BUFFER_SIZE] = {};
@ -171,8 +169,6 @@ namespace Host
WinMutex(ITH_HOOKMAN_MUTEX_ + std::to_wstring(processId));
if (GetLastError() == ERROR_ALREADY_EXISTS) return AddConsoleOutput(ALREADY_INJECTED);
static std::wstring location = Util::GetModuleFilename(LoadLibraryExW(ITH_DLL, nullptr, DONT_RESOLVE_DLL_REFERENCES)).value();
if (AutoHandle<> process = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId))
{
#ifdef _WIN64
@ -180,6 +176,7 @@ namespace Host
IsWow64Process(process, &invalidProcess);
if (invalidProcess) return AddConsoleOutput(ARCHITECTURE_MISMATCH);
#endif
static std::wstring location = Util::GetModuleFilename(LoadLibraryExW(ITH_DLL, nullptr, DONT_RESOLVE_DLL_REFERENCES)).value();
if (LPVOID remoteData = VirtualAllocEx(process, nullptr, (location.size() + 1) * sizeof(wchar_t), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE))
{
WriteProcessMemory(process, remoteData, location.c_str(), (location.size() + 1) * sizeof(wchar_t), nullptr);

4
GUI/mainwindow.cpp
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@ -78,9 +78,7 @@ MainWindow::MainWindow(QWidget *parent) :
MainWindow::~MainWindow()
{
QSettings settings(CONFIG_FILE, QSettings::IniFormat);
settings.setValue(WINDOW, geometry());
settings.sync();
QSettings(CONFIG_FILE, QSettings::IniFormat).setValue(WINDOW, geometry());
SetErrorMode(SEM_NOGPFAULTERRORBOX);
ExitProcess(0);
}

24
include/const.h
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@ -4,25 +4,11 @@
// 8/23/2013 jichi
// Branch: ITH/common.h, rev 128
enum { MESSAGE_SIZE = 500, PIPE_BUFFER_SIZE = 2000, SHIFT_JIS = 932, MAX_MODULE_SIZE = 120, HOOK_NAME_SIZE = 30 };
enum Misc { MESSAGE_SIZE = 500, PIPE_BUFFER_SIZE = 2000, SHIFT_JIS = 932, MAX_MODULE_SIZE = 120, HOOK_NAME_SIZE = 30, FIXED_SPLIT_VALUE = 0x10001 };
enum HostCommandType
{
HOST_COMMAND = -1, // null type
HOST_COMMAND_NEW_HOOK = 0,
HOST_COMMAND_REMOVE_HOOK = 1,
HOST_COMMAND_MODIFY_HOOK = 2,
HOST_COMMAND_HIJACK_PROCESS = 3,
HOST_COMMAND_DETACH = 4
};
enum HostCommandType { HOST_COMMAND_NEW_HOOK, HOST_COMMAND_REMOVE_HOOK, HOST_COMMAND_MODIFY_HOOK, HOST_COMMAND_HIJACK_PROCESS, HOST_COMMAND_DETACH };
enum HostNotificationType
{
HOST_NOTIFICATION = -1, // null type
HOST_NOTIFICATION_TEXT = 0,
HOST_NOTIFICATION_NEWHOOK = 1,
HOST_NOTIFICATION_RMVHOOK = 2
};
enum HostNotificationType { HOST_NOTIFICATION_TEXT, HOST_NOTIFICATION_NEWHOOK, HOST_NOTIFICATION_RMVHOOK };
enum HookParamType : unsigned
{
@ -30,7 +16,7 @@ enum HookParamType : unsigned
USING_UNICODE = 0x2, // type(data) is wchar_t or wchar_t*
BIG_ENDIAN = 0x4, // type(data) is char
DATA_INDIRECT = 0x8,
USING_SPLIT = 0x10, // aware of split time?
USING_SPLIT = 0x10, // use ctx2 or not
SPLIT_INDIRECT = 0x20,
MODULE_OFFSET = 0x40, // address is relative to module
FUNCTION_OFFSET = 0x80, // address is relative to function
@ -43,5 +29,3 @@ enum HookParamType : unsigned
HOOK_ENGINE = 0x4000,
HOOK_ADDITIONAL = 0x8000
};
enum { FIXED_SPLIT_VALUE = 0x10001 }; // 6/1/2014: Fixed split value for hok parameter. Fuse all threads, and prevent floating

15
include/defs.h
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@ -14,9 +14,14 @@ constexpr auto HOST_PIPE = L"\\\\.\\pipe\\TEXTRACTOR_HOST";
constexpr auto ITH_SECTION_ = L"VNR_SECTION_"; // _%d
// Mutex
// Mutexes
constexpr auto ITH_HOOKMAN_MUTEX_ = L"VNR_HOOKMAN_"; // ITH_HOOKMAN_%d
constexpr auto CONNECTING_MUTEX = L"TEXTRACTOR_CONNECTING_PIPES";
// Events
constexpr auto PIPE_AVAILABLE_EVENT = L"TEXTRACTOR_PIPE_AVAILABLE";
// Files
@ -31,6 +36,14 @@ constexpr auto REPLACE_SAVE_FILE = u8"SavedReplacements.txt";
constexpr auto DEFAULT_EXTENSIONS = u8"Remove Repetition>Lua>Copy to Clipboard>Bing Translate>Extra Window>Extra Newlines";
inline SECURITY_ATTRIBUTES allAccess = std::invoke([] // allows non-admin processes to access kernel objects made by admin processes
{
static SECURITY_DESCRIPTOR sd = {};
InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sd, TRUE, NULL, FALSE);
return SECURITY_ATTRIBUTES{ sizeof(SECURITY_ATTRIBUTES), &sd, FALSE };
});
// Functions
template <typename... Args>

21
include/types.h
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@ -48,6 +48,17 @@ private:
std::unique_ptr<void, HandleCleaner> h;
};
class WinMutex // Like CMutex but works with scoped_lock
{
public:
WinMutex(std::wstring name = L"", LPSECURITY_ATTRIBUTES sa = nullptr) : m(CreateMutexW(sa, FALSE, name.empty() ? NULL : name.c_str())) {}
void lock() { if (m) WaitForSingleObject(m, INFINITE); }
void unlock() { if (m) ReleaseMutex(m); }
private:
AutoHandle<> m;
};
// jichi 3/7/2014: Add guessed comment
struct HookParam
{
@ -83,16 +94,6 @@ struct ThreadParam
uint64_t ctx2; // The subcontext of the hook: 0 by default, generated in a method specific to the hook
};
class WinMutex // Like CMutex but works with scoped_lock
{
public:
WinMutex(std::wstring name) : m(CreateMutexW(nullptr, FALSE, name.c_str())) {}
void lock() { if (m) WaitForSingleObject(m, INFINITE); }
void unlock() { if (m) ReleaseMutex(m); }
private:
AutoHandle<> m;
};
struct InsertHookCmd // From host
{

36
vnrhook/main.cc
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@ -10,12 +10,12 @@
#include "texthook.h"
#include "util.h"
std::unique_ptr<WinMutex> viewMutex;
WinMutex viewMutex;
namespace
{
AutoHandle<> hookPipe = INVALID_HANDLE_VALUE, mappedFile = INVALID_HANDLE_VALUE;
TextHook* hooks;
TextHook (*hooks)[MAX_HOOK];
bool running;
int currentHook = 0;
DWORD DUMMY;
@ -30,21 +30,16 @@ DWORD WINAPI Pipe(LPVOID)
AutoHandle<> hostPipe = INVALID_HANDLE_VALUE;
hookPipe = INVALID_HANDLE_VALUE;
while (!hookPipe || !hostPipe)
{
if (!hookPipe)
while (!hostPipe || !hookPipe)
{
WinMutex connectionMutex(CONNECTING_MUTEX, &allAccess);
std::scoped_lock lock(connectionMutex);
WaitForSingleObject(AutoHandle<>(CreateEventW(&allAccess, FALSE, FALSE, PIPE_AVAILABLE_EVENT)), INFINITE);
hostPipe = CreateFileW(HOST_PIPE, GENERIC_READ | FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
hookPipe = CreateFileW(HOOK_PIPE, GENERIC_WRITE, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
}
if (hookPipe && !hostPipe)
{
hostPipe = CreateFileW(HOST_PIPE, GENERIC_READ | FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
DWORD mode = PIPE_READMODE_MESSAGE;
SetNamedPipeHandleState(hostPipe, &mode, NULL, NULL);
continue;
}
Sleep(50);
}
*(DWORD*)buffer = GetCurrentProcessId();
WriteFile(hookPipe, buffer, sizeof(DWORD), &count, nullptr);
@ -69,7 +64,7 @@ DWORD WINAPI Pipe(LPVOID)
}
}
hookPipe = INVALID_HANDLE_VALUE;
for (int i = 0; i < MAX_HOOK; ++i) if (hooks[i].address) hooks[i].Clear();
for (auto& hook : *hooks) if (hook.address) hook.Clear();
FreeLibraryAndExitThread(GetModuleHandleW(ITH_DLL), 0);
return 0;
}
@ -105,19 +100,19 @@ BOOL WINAPI DllMain(HINSTANCE hModule, DWORD fdwReason, LPVOID)
{
case DLL_PROCESS_ATTACH:
{
viewMutex = std::make_unique<WinMutex>(ITH_HOOKMAN_MUTEX_ + std::to_wstring(GetCurrentProcessId()));
viewMutex = WinMutex(ITH_HOOKMAN_MUTEX_ + std::to_wstring(GetCurrentProcessId()), &allAccess);
if (GetLastError() == ERROR_ALREADY_EXISTS) return FALSE;
DisableThreadLibraryCalls(hModule);
// jichi 9/25/2013: Interprocedural communication with vnrsrv.
mappedFile = CreateFileMappingW(INVALID_HANDLE_VALUE, nullptr, PAGE_EXECUTE_READWRITE, 0, HOOK_SECTION_SIZE, (ITH_SECTION_ + std::to_wstring(GetCurrentProcessId())).c_str());
hooks = (TextHook*)MapViewOfFile(mappedFile, FILE_MAP_ALL_ACCESS | FILE_MAP_EXECUTE, 0, 0, HOOK_BUFFER_SIZE);
mappedFile = CreateFileMappingW(INVALID_HANDLE_VALUE, &allAccess, PAGE_EXECUTE_READWRITE, 0, HOOK_SECTION_SIZE, (ITH_SECTION_ + std::to_wstring(GetCurrentProcessId())).c_str());
hooks = (TextHook(*)[MAX_HOOK])MapViewOfFile(mappedFile, FILE_MAP_ALL_ACCESS | FILE_MAP_EXECUTE, 0, 0, HOOK_BUFFER_SIZE);
memset(hooks, 0, HOOK_BUFFER_SIZE);
MH_Initialize();
running = true;
CreateThread(nullptr, 0, Pipe, nullptr, 0, nullptr); // Using std::thread here = deadlock
CloseHandle(CreateThread(nullptr, 0, Pipe, nullptr, 0, nullptr)); // Using std::thread here = deadlock
}
break;
case DLL_PROCESS_DETACH:
@ -143,7 +138,7 @@ void NewHook(HookParam hp, LPCSTR lpname, DWORD flag)
if (strlen(utf8Text) < 8 || strlen(codepageText) < 8 || wcslen(hp.text) < 4) return ConsoleOutput(NOT_ENOUGH_TEXT);
for (auto[addrs, type] : Array<std::tuple<std::vector<uint64_t>, HookParamType>>{
{ Util::SearchMemory(utf8Text, strlen(utf8Text), PAGE_READWRITE), USING_UTF8 },
{ Util::SearchMemory(codepageText, strlen(codepageText), PAGE_READWRITE), (HookParamType)0 },
{ Util::SearchMemory(codepageText, strlen(codepageText), PAGE_READWRITE), USING_STRING },
{ Util::SearchMemory(hp.text, wcslen(hp.text) * 2, PAGE_READWRITE), USING_UNICODE }
})
for (auto addr : addrs)
@ -164,14 +159,13 @@ void NewHook(HookParam hp, LPCSTR lpname, DWORD flag)
if (lpname && *lpname) strncpy_s(hp.name, lpname, HOOK_NAME_SIZE - 1);
ConsoleOutput(INSERTING_HOOK, hp.name);
if (hp.address) RemoveHook(hp.address, 0);
if (!hooks[currentHook].Insert(hp, flag)) ConsoleOutput(HOOK_FAILED);
if (!(*hooks)[currentHook].Insert(hp, flag)) ConsoleOutput(HOOK_FAILED);
}
}
void RemoveHook(uint64_t addr, int maxOffset)
{
for (int i = 0; i < MAX_HOOK; i++)
if (abs((long long)(hooks[i].address - addr)) <= maxOffset) return hooks[i].Clear();
for (auto& hook : *hooks) if (abs((long long)(hook.address - addr)) <= maxOffset) return hook.Clear();
}
// EOF

6
vnrhook/texthook.cc
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@ -11,7 +11,7 @@
#include "text.h"
#include "ithsys/ithsys.h"
extern std::unique_ptr<WinMutex> viewMutex;
extern WinMutex viewMutex;
// - Unnamed helpers -
@ -101,7 +101,7 @@ void SetTrigger()
bool TextHook::Insert(HookParam h, DWORD set_flag)
{
std::scoped_lock lock(*viewMutex);
std::scoped_lock lock(viewMutex);
hp = h;
address = hp.address;
hp.type |= set_flag;
@ -283,7 +283,7 @@ void TextHook::RemoveReadCode()
void TextHook::Clear()
{
std::scoped_lock lock(*viewMutex);
std::scoped_lock lock(viewMutex);
if (*hp.name) ConsoleOutput(REMOVING_HOOK, hp.name);
if (hp.type & DIRECT_READ) RemoveReadCode();
else RemoveHookCode();