Secured XML parsing

platforms/heterogeneous/README.md

@@ -36,7 +36,11 @@ Fundamental architecture approach:
                 -   **Memory**: amount of storage shared by all processors in the node.
 
 Energy and computational power are expressed per core for fine grain analysis. Cores are SimGrid *hosts*, so they are considered as individual resources.  
-Network types apply to both the node up / down links, the cluster backbones and the global links in the main zone. 
+Network types apply to both the node up / down links, the cluster backbones and the global links in the main zone.
+
+## Requirements
+
+-   [LXML](https://pypi.org/project/lxml/) Python package
 
 ## Usage
 

platforms/heterogeneous/generate_platform.py

 #!/usr/bin/env python3
 import argparse
 import json
-import xml.dom.minidom as xml_format
-import xml.etree.ElementTree as xml
+import defusedxml.minidom as xml_format
+from defusedxml.lxml import _etree as xml
 
 def main():
     """
@@ -141,7 +141,7 @@ def main():
 
                             xml.SubElement(cluster_xml, "host_link",
                                 attrib={"id": core_id, "up": udlink_id, "down": udlink_id})
-                        
+
                         for core_idx in range(int(proc_template["nb_cores"])):
                             core_id = "cor_{}_{}".format(core_idx, proc_id)
                             _core_attrs = {"id": core_id}