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Dll hijacking fixes: Windows version check + SetDllDirectory("").

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This commit is contained in:
John Preston 2016-08-14 21:55:59 +03:00
parent 994576375e
commit 50b10ba0bf
3 changed files with 42 additions and 11 deletions
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46
Telegram/SourceFiles/platform/win/windows_dlls.cpp
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@ -24,6 +24,23 @@ Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
namespace Platform {
namespace Dlls {
f_SetDllDirectory SetDllDirectory;
HINSTANCE LibKernel32;
void init() {
static bool inited = false;
if (inited) return;
inited = true;
LibKernel32 = LoadLibrary(L"KERNEL32.DLL");
load(LibKernel32, "SetDllDirectoryW", SetDllDirectory);
if (SetDllDirectory) {
// Remove the current directory from the DLL search order.
SetDllDirectory(L"");
}
}
f_SetWindowTheme SetWindowTheme;
f_OpenAs_RunDLL OpenAs_RunDLL;
f_SHOpenWithDialog SHOpenWithDialog;
@ -45,8 +62,7 @@ HINSTANCE LibPropSys;
HINSTANCE LibComBase;
void start() {
LibUxTheme = LoadLibrary(L"UXTHEME.DLL");
load(LibUxTheme, "SetWindowTheme", SetWindowTheme);
init();
LibShell32 = LoadLibrary(L"SHELL32.DLL");
load(LibShell32, "SHAssocEnumHandlers", SHAssocEnumHandlers);
@ -56,17 +72,25 @@ void start() {
load(LibShell32, "SHQueryUserNotificationState", SHQueryUserNotificationState);
load(LibShell32, "SetCurrentProcessExplicitAppUserModelID", SetCurrentProcessExplicitAppUserModelID);
LibWtsApi32 = LoadLibrary(L"WTSAPI32.DLL");
load(LibWtsApi32, "WTSRegisterSessionNotification", WTSRegisterSessionNotification);
load(LibWtsApi32, "WTSUnRegisterSessionNotification", WTSUnRegisterSessionNotification);
auto version = QSysInfo::windowsVersion();
if (version >= QSysInfo::WV_VISTA) {
LibUxTheme = LoadLibrary(L"UXTHEME.DLL");
load(LibUxTheme, "SetWindowTheme", SetWindowTheme);
LibPropSys = LoadLibrary(L"PROPSYS.DLL");
load(LibPropSys, "PropVariantToString", PropVariantToString);
LibWtsApi32 = LoadLibrary(L"WTSAPI32.DLL");
load(LibWtsApi32, "WTSRegisterSessionNotification", WTSRegisterSessionNotification);
load(LibWtsApi32, "WTSUnRegisterSessionNotification", WTSUnRegisterSessionNotification);
LibComBase = LoadLibrary(L"COMBASE.DLL");
load(LibComBase, "RoGetActivationFactory", RoGetActivationFactory);
load(LibComBase, "WindowsCreateStringReference", WindowsCreateStringReference);
load(LibComBase, "WindowsDeleteString", WindowsDeleteString);
LibPropSys = LoadLibrary(L"PROPSYS.DLL");
load(LibPropSys, "PropVariantToString", PropVariantToString);
if (version >= QSysInfo::WV_WINDOWS8) {
LibComBase = LoadLibrary(L"COMBASE.DLL");
load(LibComBase, "RoGetActivationFactory", RoGetActivationFactory);
load(LibComBase, "WindowsCreateStringReference", WindowsCreateStringReference);
load(LibComBase, "WindowsDeleteString", WindowsDeleteString);
}
}
}
} // namespace Dlls

6
Telegram/SourceFiles/platform/win/windows_dlls.h
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@ -27,6 +27,12 @@ Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
namespace Platform {
namespace Dlls {
void init();
// KERNEL32.DLL
typedef BOOL (FAR STDAPICALLTYPE *f_SetDllDirectory)(LPCWSTR lpPathName);
extern f_SetDllDirectory SetDllDirectory;
void start();
template <typename Function>

1
Telegram/SourceFiles/pspecific_win.cpp
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@ -737,6 +737,7 @@ void psShowInFolder(const QString &name) {
namespace Platform {
void start() {
Dlls::init();
}
void finish() {