Don't grant unnecessary handle privileges in OpenProcessHandle.

This patch makes it harder for process handles with more privileges
to leak to untrusted places.

Review URL: http://codereview.chromium.org/125260

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18802 0039d316-1c4b-4281-b951-d872f2087c98

base/process_util_win.cc

@@ -34,11 +34,10 @@ ProcessHandle GetCurrentProcessHandle() {
 }
 
 bool OpenProcessHandle(ProcessId pid, ProcessHandle* handle) {
-  // TODO(phajdan.jr): Take even more permissions out of this list.
-  ProcessHandle result = OpenProcess(PROCESS_DUP_HANDLE |
-                                         PROCESS_TERMINATE |
-                                         PROCESS_QUERY_INFORMATION |
-                                         SYNCHRONIZE,
+  // We try to limit privileges granted to the handle. If you need this
+  // for test code, consider using OpenPrivilegedProcessHandle instead of
+  // adding more privileges here.
+  ProcessHandle result = OpenProcess(PROCESS_DUP_HANDLE | PROCESS_TERMINATE,
                                      FALSE, pid);
 
   if (result == INVALID_HANDLE_VALUE)

chrome/test/chrome_process_util.cc

@@ -29,7 +29,7 @@ void TerminateAllChromeProcesses(const FilePath& data_dir) {
       base::ProcessHandle handle;
       // Ignore processes for which we can't open the handle. We don't guarantee
       // that all processes will terminate, only try to do so.
-      if (base::OpenProcessHandle(*it, &handle))
+      if (base::OpenPrivilegedProcessHandle(*it, &handle))
         handles.push_back(handle);
     }
   }

chrome/test/memory_test/memory_test.cc

@@ -290,7 +290,7 @@ class MemoryTest : public UITest {
       scoped_ptr<base::ProcessMetrics> process_metrics;
       IoCounters io_counters;
       base::ProcessHandle process_handle;
-      if (!base::OpenProcessHandle(*it, &process_handle)) {
+      if (!base::OpenPrivilegedProcessHandle(*it, &process_handle)) {
         NOTREACHED();
       }
       process_metrics.reset(

chrome/test/page_cycler/page_cycler_test.cc

@@ -233,7 +233,7 @@ class PageCyclerTest : public UITest {
     ChromeProcessList::const_iterator it;
     for (it = chrome_processes.begin(); it != chrome_processes.end(); ++it) {
       base::ProcessHandle process_handle;
-      if (!base::OpenProcessHandle(*it, &process_handle)) {
+      if (!base::OpenPrivilegedProcessHandle(*it, &process_handle)) {
         NOTREACHED();
       }
 
@@ -303,7 +303,7 @@ class PageCyclerTest : public UITest {
     ChromeProcessList::const_iterator it;
     for (it = chrome_processes.begin(); it != chrome_processes.end(); ++it) {
       base::ProcessHandle process_handle;
-      if (!base::OpenProcessHandle(*it, &process_handle)) {
+      if (!base::OpenPrivilegedProcessHandle(*it, &process_handle)) {
         NOTREACHED();
       }