couchdb-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jan Lehnardt <>
Subject Re: Elixir Sandbox
Date Wed, 16 Oct 2013 21:29:26 GMT

On Oct 16, 2013, at 23:16 , Benoit Chesneau <> wrote:

> On Wed, Oct 16, 2013 at 10:54 PM, Filippo Fadda <
>> wrote:
>> Sandboxing is something optional I think, you need only when you are
>> developing a CouchApp, when you do all in JavaScript, using the _users
>> database and running the app inside CouchDB. But if you are just using
>> CouchDB like a database, developing a web app using PHP or Python, for
>> example, you'll never give access to CouchDB from outside, through Futon
>> for example, so no one will be able to store a new design doc in your
>> database to run malicious code. I'm using PHP with the ElephantOnCouch
>> Query Server, writing ddoc in PHP, and I really don't see why I should
>> using runkit to sandboxing the Query Server.
>> -Filippo
> Sandboxing is not only needed for couchapps but also views. If someone
> using a view inspect your hd  and emit the result or send  your docs using
> a tcp connections to an unknown remote target it can be a risk. That's why
> it's needed. Even allowed users can be a possible risk.

I think Filippo used “CouchApps” as a synonym for “you may receive code
not written by you or someone your trust” in which case you absolutely
want a sandbox.

My point was just that there are equally scenarios where that trust exists
and Filippo illustrated them a bit better than I did originally.

So yes, Elixir please! :) And if we get a sandbox as well, we can even
enable it by default :)


>> On Oct 16, 2013, at 10:27 PM, Jan Lehnardt wrote:
>>> Another option would be to start with treating the Elexir Query Server
>>> like the Erlang Query Server and keep it off by default and with full
>>> access to the internals, so people could opt into it, if their
>> environment
>>> allows for it.
>>> Sandboxing could be a step on top or later.
>>> I for one would like to see native Elexir support for Views in
>> CouchDB :)
>>> Best
>>> Jan
>>> --
>>> On Oct 16, 2013, at 20:48 , Paul Davis <>
>> wrote:
>>>> There have been discussions on figuring out how to sandbox Erlang. The
>>>> biggest thing on that front was that we'd want it to be a whitelist as
>>>> opposed to a blacklist of modules and/or module/function pairs. The
>>>> second is that with dynamic invocation its not immediately apparent if
>>>> that's entirely possible to do.
>>>> On Wed, Oct 16, 2013 at 10:39 AM, Chris Keele <>
>> wrote:
>>>>> Hey everyone! I'm trying to develop a sandbox for Elixir, and I wanted
>> to see how such a library might prove useful to the CouchDB dev community.
>>>>> My initial goal is just to be able to run string of code in a
>> predefined environment with configurable modules disabled, returning all
>> output. But I'd like to design it for bigger things from the ground up, so
>> I was wondering what sorts of requirements you might have of a sandbox
>> library if you wanted to, say, implement a secure view processor.
>>>>> I've started a discussion thread here:
>>!topic/elixir-lang-talk/wA1l74HCZmI, but
>> I'm particularly interested in your opinions!
>>>>> --
>>>>> Chris Keele

View raw message