netgear multi devices password disclosure: fix check method too restrictive

routersploit/modules/exploits/netgear/multi_password_disclosure-201701.py

@@ -115,8 +115,9 @@ class Exploit(exploits.Exploit):
 
         response = http_request(method="GET", url=url)
 
-        if response is not None and response.status_code == 200:
-            if response.headers.get('WWW-Authenticate') is not None:
-                return 'unauth.cgi?id=' in response.text  # target is vulnerable
+        if response is not None:
+            header = response.headers.get('WWW-Authenticate')
+            if header is not None and 'NETGEAR' in header.upper():
+                return True  # target is vulnerable
 
         return False  # target is not vulnerable