resolves kubernetes-client#2333

kubernetes/base/config/exec_provider.py

@@ -58,6 +58,13 @@ def __init__(self, exec_config, cwd, cluster=None):
         else:
             self.cluster = None
         self.cwd = cwd or None
+
+    @property
+    def shell(self):
+        # for win32 shell should be True
+        # for others like linux and darwin shell should be False
+        # see https://github.com/kubernetes-client/python/pull/2289
+        return sys.platform == "win32"
 
     def run(self, previous_response=None):
         is_interactive = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
@@ -82,7 +89,7 @@ def run(self, previous_response=None):
             cwd=self.cwd,
             env=self.env,
             universal_newlines=True,
-            shell=True)
+            shell=self.shell)
         (stdout, stderr) = process.communicate()
         exit_code = process.wait()
         if exit_code != 0: