Enable ALPC lockdown on >= win10

content/common/sandbox_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/sandbox_win.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 567 matching lines @@
       policy->SetJobMemoryLimit(4ULL * 1024 * 1024 * 1024);
   if (ret != sandbox::SBOX_ALL_OK)
     return ret;
 #endif
   return policy->SetJobLevel(job_level, ui_exceptions);
 }
 
 // TODO(jschuh): Need get these restrictions applied to NaCl and Pepper.
 // Just have to figure out what needs to be warmed up first.
 sandbox::ResultCode AddBaseHandleClosePolicy(sandbox::TargetPolicy* policy) {
+  if (base::win::GetVersion() >= base::win::VERSION_WIN10) {
+    // Close all ALPC ports.
+    sandbox::ResultCode ret =
+        policy->AddKernelObjectToClose(L"ALPC Port", NULL);
+    if (ret != sandbox::SBOX_ALL_OK) {
+      return ret;
+    }
+  }
   // TODO(cpu): Add back the BaseNamedObjects policy.
   base::string16 object_path = PrependWindowsSessionPath(
       L"\\BaseNamedObjects\\windows_shell_global_counters");
   return policy->AddKernelObjectToClose(L"Section", object_path.data());
 }
 
 sandbox::ResultCode AddAppContainerPolicy(sandbox::TargetPolicy* policy,
                                           const wchar_t* sid) {
   if (IsAppContainerEnabled())
     return policy->SetLowBox(sid);
@@ skipping 234 matching lines @@
   }
 
   delegate->PostSpawnTarget(target.process_handle());
 
   CHECK(ResumeThread(target.thread_handle()) != static_cast<DWORD>(-1));
   *process = base::Process(target.TakeProcessHandle());
   return sandbox::SBOX_ALL_OK;
 }
 
 }  // namespace content