After a short exchange of friendly but accusatory cross-continental messages, I’ve learned something new about .NET projects today. Let me start with the symptoms as that’s the first thing I Googled for and how I suspect others will find this and save themselves some pain in the future. Let’s say you have a solution like this: This is a brand newie right out of the box to demonstrate the problem. The web project references the ClassLibrary project as a project reference. In other words, the...

I’ll admit to some amusement when I see friends liking pages such as this: I’ll admit to even more amusement when they’re mature adults (of either gender) or as seen recently, when they’re my mother in law. Of course when confronted about their salacious ways they’ll always swear black and blue that they never “liked” the link. Except they did, they just didn’t know it. What you’re seeing here is a Facebook “worm” or in other words a script which replicates itself. Someone sees it, clicks th...

This content is now available in the Pluralsight course "Ethical Hacking: SQL Injection" [http://www.pluralsight.com/courses/ethical-hacking-sql-injection]You know what really strikes me about a lot of the hacks we’ve seen lately? It just seems too easy. I mean we’re seeing a huge number of attacks (an unprecedented number, by some figures) and all too often the perpetrator is a kid. I don’t mean that in a relative sense to myself as I get older, I mean literally a child. The problem, of course...

Who’s hacking us? How are we (as developers) making this possible? What are some of the common flaws we’re building into software? And what exactly is “pwned” anyway?! All these questions and more come up and get answered in the presentation I made to Developers Developers Developers! [http://lanyrd.com/2012/dddsydney/] in Sydney a few months ago. Fortunately the good folks at SSW [http://www.ssw.com.au/ssw/default.aspx] were kind enough to record and very professionally produce a number of the...

Last week, with the help of the good folks at Red Gate, I set up a little competition to give away 5 licenses [https://www.troyhunt.com/2012/09/life-without-source-control-share-your.html] of their very excellent SQL Source Control [http://www.red-gate.com/products/sql-development/sql-source-control/] product. The entry criteria was simple – share your most painful experience which could have been avoided by using source control. Many painful stories emerged but I thought it worth sharing and c...

Back around the turn of the millennium and during the final heights of the dot com boom, I found myself in London building the UX for the brand new online-only cahoot bank [http://www.cahoot.co.uk/]. (I then realised the miserable weather I was enduring was, in fact, summer and hastily returned to a balmy Aussie winter. But I digress.) As with most things dot com, days regularly stretched into nights and frequently consisted of copious amounts of both caffeine and beer. Mistakes were made. The...

Who likes being treated like they’re in a minority group? Unless it means you’re in that exclusive group of playboy (or girl) billionaires, “minority group” often ends up with you being unfairly discriminated against because you don’t represent the perceived majority. As with social discrimination, technology discrimination is frequently the product of ignorance; people often don’t understand the impact of their choices. What a lot of this boils down to is culture, or more specifically, lack of...

There are two security principles which I hold dearly but are often counterintuitive: 1. Users should be able to create any conceivable password they desire – no limits! 2. All input should be treated as hostile and properly sanitised against a whitelist. This is counterintuitive advice in so far as that second point has always been partially supported natively by ASP.NET request validation. I say “partially” because it’s not the final word in request validation [http://www.asp.ne...

Remember hash DoS [https://www.troyhunt.com/2011/12/has-hash-dos-patch-been-installed-on.html]? This was that very clever yet equally nasty little attack which meant that if you formatted the parameters in a post request juuuuust right you could take down an ASP.NET website with a mere single request. Bugger. This made for a rather unpleasant Christmas and New Year period for a number of people at Microsoft as well as sys admins the world over. Microsoft had rapidly released a the MS11-100 [htt...

As many readers and followers will know, I’ve had a bit of fun with scammers [https://www.troyhunt.com/2012/04/type-www-ok-w-w-w-d-o-t-antagonising.html] in the past. Remember those guys who call you up while you’re sitting down for dinner and tell you your computer has all sorts of nasties in it? Yeah, those guys. The blog posts I’ve made have been part of the story and inevitably the one most people are familiar with, but there are a few other things happening which I think some of you would...