Shaun Mccran

My digital playground

09
J
U
L
2009

Basic fusebox fuseaction to handle security references

I am a big fan of fusebox, I like the way it handles inheritance, and I love the fact that it instinctively lends itself to a modular approach.

Part of the strength in using fusebox is in knowing exactly when each of the framework fuse actions run, and just what sort of functionality you can embed in them. In this case I'm using the "Pre fuse Action" to perform a basic security validation on any fuseactions in that circuit.

view plain print about
1<cffunction name="prefuseaction">
2        <cfargument name="myFusebox" />
3        <cfargument name="event" />
4
5
6    </cffunction>

Above is a blank prefuseaction, insert any code you want to perform on any of the other fuseactions in that circuit here. Note that it runs before the circuit action.

A basic session validation script could be something like:

view plain print about
1<!--- check that user is logged in --->
2        <cfif NOT isdefined('session.loggedIn')>
3            <cfset session.logoutMsg = "Your session has timed out, please login again">
4            <cflocation url="index.cfm">
5            
6            <cfif NOT isdefined('session.superadmin')>
7                <cfset session.logoutMsg = "You do not have sufficient rights to view Super admin functions">
8                <cflocation url="index.cfm">
9            </cfif>
10
11        </cfif>

In the code above I am checking for a valid session variables, and if it is not there sets an error message and redirects to the homepage.

This is a pretty basic "catch all - are you logged in?" type query, but if you have an administration circuit then it provides good basic fuseaction protection. I've extended it out one step further by creating a cfc call to this code which just returns true/false. Something like this:

view plain print about
1<cfif application.security.check()>true<cfelse>false</cfif>

I am currently extending this further with more robust security, and user roles and groups.

02
J
U
L
2009

Coldfusion dropping session ID in fusebox application

I recently rolled out beta version of a new application I've been writing, only to discover that there was a bizarre session problem that didn't exist in dev, but does in live.

I've worked it out, but I thought I'd explore it some more. It is a fusebox 5.5 non xml application. The error I had was that as soon as I made a call through a "new" circuit, IE one I hadn't called before ColdFusion would generate a new session ID, and thus invalidate my current active session.

Looking through my application CFC I had this line of code present.

view plain print about
1<cfset this.SetClientCookies = false />

Setting this to true fixed the issue. This is because ColdFusion relies on the CFID and CFTOKEN to maintain the session state. You can either pass these two variables through the URL on every page request, which is a bit messy, or you can use a cookie. It is the variable above that lets the application use cookies on the user's session.

The problem with setClientCookies is that it is persistent, IE it is built for that session, and left on the user's pc, even after the session has expired, or they have left the application. Also some users will accept per-session cookies, but not persistent session cookies.

They are a lot more secure as per-session cookies, as they cannot be duplicated and hacked to spoof a previous user's session, and if you pass the token through the URL it is easy changed.

You could put something like this in your onRequestend function in application.cfc

view plain print about
1<cfif IsDefined("Cookie.CFID") AND
2IsDefined("Cookie.CFTOKEN")>

3<cfset cfid_local = Cookie.CFID>
4<cfset cftoken_local = Cookie.CFTOKEN>
5<cfcookie name="CFID" value="#cfid_local#">
6<cfcookie name="CFTOKEN" value="#cftoken_local#">
7</cfif>

This will make them per-session. I originally thought that it was something to do with the Fusebox framework, but I had overlooked the simple fact that it was still a new page request, so would be lost. Although this doesn't explain why I wasn't getting this error in my development environment but did in live.

19
J
U
N
2009

IE 8 Https security warning pop up prompt annoyances

With the continue rollout of IE 8 some issues rise to the top of pile in the way the browser interacts with users. I can see 'why' this next issue occurs, but it doesn't handle the user interaction very well at all.

One of the more significant changes is the way that IE handles security exceptions. The message to the user has been changed to be inversed. Usually a user will look for an 'ok' button, but in this instance 'ok' is the wrong answer (see screenshot).

This pop up happens when the site you are on is serving up non https content on an https URL, IE images and style links that are http://url/image.src rather than https://.

The only work around for this seems to be either having a user manually edit their IE settings, like this:

view plain print about
1Tools > internet options > security > custom level > display mixed content: Enable

This isn't exactly reasonable though. The other fix is to change all your content to be https. This is potentially a huge code change depending on how your site works.

I was hoping to find an IE 8 compatibility setting to revert this back to the same handling method as IE 7, but that doesn't seem to exist. If anyone has any ideas feel free to comment!

28
M
A
Y
2009

Twitter follow - spamming

With the growing phenomenon that is Twitter (don't people remember it from 2004 when it wasn't cool?) There also seems to be a growing trend for random uninvited following. Its only Wednesday and I've had six uninvited 'followings' from people that I have never met, nor share any common associates.

I'm all for social networking – in its proper place, but if Twitter is attracting follow-spam then it's a slippery slope to being blocked altogether. I wonder if they have thought about the whole 'invitation-accept' handshake model of adding contacts that several other social networking sites use.

In the meantime if I don't know you....you're getting blocked.

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