Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

(tye)Re: Alternatives to Taint Checking?

by tye (Sage)
on May 24, 2001 at 03:29 UTC ( [id://82771]=note: print w/replies, xml ) Need Help??


in reply to Alternatives to Taint Checking?

But in the context of taint checking w/ CGI, isn't the main point just that you should scrub your CGI parameters?? Your web server should not be set-UID to root so the security problem is that stuff from "the world" needs to be checked.

So isn't a reasonable solution as simple as replacing the few CGI.pm methods that get data from the client with versions that require "scrubbing instructions"? I'd probably make a tiny hack to CGI.pm to prevent it from being used directly and then make a CGI::Safe where the param() method is a fatal error but safeparam() requires an extra argument that is the scrubbing instructions.

I'd support a few formats of scrubbing instructions. You should make the most common case of requiring the parameter value to match /^\w[-\w.]*\z/ be very easy. But if a ref to a regex is provided, then apply the regex and die if it fails, return $1 if successful. If a code ref is provided, just run that code.

        - tye (but my friends call me "Tye")

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://82771]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others having a coffee break in the Monastery: (3)
As of 2024-03-29 01:51 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found