Skip to main content

Why IE rejects your cookies for no apparent reason

Seriously, WTF.

I'll summarize for those of you who are allergic to MSN knowledge base articles, although this one is fairly to-the-point:

If you implement a FRAMESET whose FRAMEs point to other Web sites on the networks of your partners or inside your network, but you use different top-level domain names... IE silently rejects cookies sent from third party sites.

This bit me today while adding facebook support to my text-based game -- I'm going the IFRAME route for fb support rather than rewrite the whole app in FBML thankyouverymuch, and yes, apparently IFRAME counts too for IE retard-mode.

What makes me cry a little inside is not the two hours spent deep in old and crufty login and cookie-setting legacy code wondering what the flaming hell was going on. No, what makes me cry is that I got screwed by a setting that will never block the bad guys, because labeling yourself a good guy is entirely voluntary. It's like someone at MS read the evil bit RFC and took it seriously.

The mind boggles.

In the meantime, if you know where your web framework's cookie code lives, do everyone a favor and patch it now to add that P3P header given in the knowledge base by default. And an option to disable it if you're obsessive-compulsive that way.


Jack Diederich said…
Oh yes, I've even done strange things like use a large number of invisible frames (like 10+) to communicate information. You can count the frames even if you can't see their contents.
Raven said…
If you were supposed to modify the P3P header of the parent content this would actually be a half-decent way of declaring "yes, I have put a little thought into cross-site scripting attacks".

But in the client P3P header? WTF indeed!

I am now feeling smug about having rejected P3P as retarded years ago.
Anonymous said…
I'm not sure I understand your post, but I'm running into a related problem. In IE, in a cross-domain iframe, the browser won't *send* cookies associated with that domain.
Unogeeks said…
thanks for sharing.Mulesoft is the Most Widely Used Integration Platform. If you want to become Mulesoft Certified Developer, attend this Best Mulesoft Training Course offered by the Unogeeks (Top Mulesoft Training Institute)
Unogeeks said…
nice and interesting post. Keep posting. Thanks for sharing.

Oracle Fusion SCM Online Training

Popular posts from this blog

Why schema definition belongs in the database

Earlier, I wrote about how ORM developers shouldn't try to re-invent SQL . It doesn't need to be done, and you're not likely to end up with an actual improvement. SQL may be designed by committee, but it's also been refined from thousands if not millions of man-years of database experience. The same applies to DDL. (Data Definition Langage -- the part of the SQL standard that deals with CREATE and ALTER.) Unfortunately, a number of Python ORMs are trying to replace DDL with a homegrown Python API. This is a Bad Thing. There are at least four reasons why: Standards compliance Completeness Maintainability Beauty Standards compliance SQL DDL is a standard. That means if you want something more sophisticated than Emacs, you can choose any of half a dozen modeling tools like ERwin or ER/Studio to generate and edit your DDL. The Python data definition APIs, by contrast, aren't even compatibile with other Python tools. You can't take a table definition

Python at

At my day job, I write code for a company called Berkeley Data Systems. (They found me through this blog, actually. It's been a good place to work.) Our first product is free online backup at . Our second beta release was yesterday; the obvious problems have been fixed, so I feel reasonably good about blogging about it. Our back end, which is the most algorithmically complex part -- as opposed to fighting-Microsoft-APIs complex, as we have to in our desktop client -- is 90% in python with one C extension for speed. We (well, they, since I wasn't at the company at that point) initially chose Python for speed of development, and it's definitely fulfilled that expectation. (It's also lived up to its reputation for readability, in that the Python code has had 3 different developers -- in serial -- with very quick ramp-ups in each case. Python's succinctness and and one-obvious-way-to-do-it philosophy played a big part in this.) If you try it out, pleas

A review of Lambda School from the father of a recent graduate

Background I’ve been a professional developer for twenty years.  I exposed my son N to programming a couple times while he was growing up --  Scratch when he was around 8, Khan Academy javascript when he was 12.  He learned it easily enough but it didn’t grab him. But his junior year in high school he had a hole in his schedule and I convinced him to try AP CS to fill it.  And this time, he got hooked.  He started programming for fun in the evenings.  You know how it goes. Then in March 2020, Covid hit and his high school went virtual.  It was a terrible experience, to the point that instead of going back for more his senior year, he took the last classes he needed to graduate over the summer, and decided to apply to programming boot camps in the fall.  I think the American college system is broken , so I was happy to help evaluate his options for something different. Evaluating boot camps N and I came up with three criteria for evaluating boot camps.  If they didn’t meet these three,