Running JS code on a server

[Jim Laskey (Oracle)]

From: Eliezer Julian <Eliezer.Julian at sapiens.com <mailto:Eliezer.Julian at sapiens.com>>
Subject: Running JS code on a server
Date: May 1, 2017 at 6:28:05 AM ADT
To: "nashorn-dev at openjdk.java.net <mailto:nashorn-dev at openjdk.java.net>" <nashorn-dev at openjdk.java.net <mailto:nashorn-dev at openjdk.java.net>>
Cc: Elior Apelbaum <Elior.Apelbaum at sapiens.com <mailto:Elior.Apelbaum at sapiens.com>>, Moshe Robinov <Moshe.Robinov at sapiens.com <mailto:Moshe.Robinov at sapiens.com>>, Chen Malka <chen.malka at sapiens.com <mailto:chen.malka at sapiens.com>>


Hi,
 
I am developing a server side application and would like to add a feature that allows a user to submit JS code to be executed via Nashorn. My concern is that a user may submit malicious code that may compromise the server. I have already limited the script’s access to the bare minimum of Java classes, and have implemented a mechanize to kill the script if execution time runs over a certain limit. I have also manually removed many of the special methods such as print, echo, exit and quit from the Bindings object. However, this is extremely limited in scope compared to the damage a willfully malicious user may be able to effect via this feature (such as allocating too much memory, try to access the file system via the script, etc.). I was wondering if the Nashorn development team had any recommendations as far as security is concerned, and whether there are any plans to add additional security features in the future.
 
Thanks,
 
Eli Julian
Software Developer
Decision Division

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