Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You can check out this project, it seems very promising:</p> <p><a href="http://github.com/gf3/node-sandbox" rel="nofollow noreferrer">http://github.com/gf3/node-sandbox</a></p> <p>Personally, I don't use Node to do arbitrary SSJS execution. You probably won't like this solution, but it's worked fine for me for about a year:</p> <p>There's a Perl implementation of Spidermonkey's API (Spidermonkey is Firefox's JS engine) <a href="http://search.cpan.org/~mschilli/JavaScript-SpiderMonkey-0.12/SpiderMonkey.pm" rel="nofollow noreferrer">that's available</a>. I hooked that up with the help of some CGI. You can specify in it exactly what functions you want to expose (granted, it's in Perl...blech) and execute whatever code you please. There's no risk of vulnerabilities since the entire setup is completely sandboxed. It does not simulate the DOM.</p> <p>The way I implemented this on my server (to prevent abuse) was to issue tokens which granted a one-use access through a REST API on a different server. It's a simple HMAC implementation that includes a timestamp to enforce the legitimacy of the token. When the Perl script receives a request, it validates the token and processes the script (the script should just be part of a POST request). The Perl script then just writes the results. My server is set to hit a timeout at around 10 seconds.</p> <p>Hope this helps!</p>
    singulars
    1. This table or related slice is empty.
    1. POSecuring SSJS against unverified code
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USmattbasta
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO@Rook Actually, you're wrong. It's not even encryption, it's authentication. It's the same technique that Amazon AWS uses. More technically, it's not a "crypto magic wand", it's a legitimate means of securing any front-facing REST API. It doesn't matter what is used as an HMAC secret. Hop on any random text generator and use the first 30 characters or so, it doesn't matter. Though you've made it apparent that you don't understand very much about security.
      singulars
      1. PO
      1. USmattbasta
    2. CO@mattbasta crypto is short for cryptography and a cryptographic hash function such as sha256 falls under this category. Clearly security is a very in depth topic and everyone has more to learn. But in short i strongly dislike this approach to managing a remote code execution vulnerability. There is a good quote "If eval() is the answer then you are asking the wrong question". There is absolutely no good reason for someone to be executing code like this. It is likely that the OP is taking a short cut and he will be burned by this partial answer.
      singulars
      1. PO
      1. USrook
    3. CO@Rook For the last time, it is not a vulnerability. There is no "eval", as the code is running in an environment with literally nothing to break. There is literally no means of modifying sensitive information, accessing the disk, or making outbound requests. That's the idea behind a sandbox: clearly a topic that your security professor must have skimmed over. Sure, executing code in an `eval` statement is bad, but if the OP wants to run a user's JS, then running it in a sandboxed setting is the safest and most effective means of achieving that goal. Name one vulnerability exposed by a sandbox.
      singulars
      1. PO
      1. USmattbasta
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload