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Sample ColdFusion 9+ script to prevent Fallback Scope Injection. URL & Form variables are universally accessible in the scope & used as fallback.
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| <!--- Sample ColdFusion 9+ script to prevent Fallback Scope Injection. URL & Form variables are universally accessible in the scope & used as fallback. | |
| Based on insights provided by Peter Freitag's blog post http://www.petefreitag.com/item/834.cfm ---> | |
| <cfscript> | |
| Scopes = "arguments,local,thread,variables,cgi,cookie,client,request,application,session,server,caller,thistag,this"; | |
| for (thisField in Form) { | |
| if (ListLen(thisField,".") GT 1 AND ListFindNocase(Scopes, trim(ListFirst(ThisField,".")))){ | |
| StructDelete(Form, thisField); | |
| if (ListFindnocase(Form.Fieldnames, ThisField)){ | |
| Form.Fieldnames = ListDeleteAt(Form.Fieldnames, ListFindnocase(Form.Fieldnames, ThisField)); | |
| } | |
| } | |
| } | |
| for (thisField in URL) { | |
| if (ListLen(thisField,".") GT 1 AND ListFindNocase(Scopes, trim(ListFirst(ThisField,".")))){ | |
| StructDelete(URL, thisField); | |
| } | |
| } | |
| </cfscript> |
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