|06 Feb 2009||#1|
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UAC Feedback and Follow-Up
When we started the “E7” blog we were both excited and also a bit uneasy. The excitement is obvious. The unease is because at some point we knew we would mess up. We weren’t sure if we would mess up because we were blogging about a poorly designed feature or mess up because we were blogging poorly about a well-designed feature. To some it appears as though with the topic of UAC we’ve managed to do both. Our dialog is at that point where many do not feel listened to and also many feel various viewpoints are not well-informed. That’s not the dialog we set out to have and we’re going to do our best to improve.
This post is an attempt to get both the blog right and the feature right. We don’t like where we are in terms of how folks are feeling and we don’t feel good – Windows 7 is too much fun and folks are having too much fun for us to be having the dialog we’re having. We hope this post allows us to get back to having fun!
To start we’ll just show representative comments from the spectrum of feedback. We’ll then talk about the changes we’re making and also make sure we’re all on the same page regarding how we move forward. In terms of comments we’ve heard the following:
You have 95% of the people out there think you got it wrong, even if they are the ones that got it wrong. The problem is that they are the one's that buy and recommend your product. So do you give them a false sense of increased security by implementing the change (not unlike security by obscurity) and making them happy, or do you just fortify the real security boundaries?And @Thack says:
Jon,With this feedback and a lot more we are going to deliver two changes to the Release Candidate that we’ll all see. First, the UAC control panel will run in a high integrity process, which requires elevation. That was already in the works before this discussion and doing this prevents all the mechanics around SendKeys and the like from working. Second, changing the level of the UAC will also prompt for confirmation.
Sometimes, inconsistency with your own ideals is a good thing. Make an exception, if only to put people's fears to rest.That sums up where we are heading. The first change was a bug fix and we actually have a couple of others similar to that—this is a beta still, even if many of us are running it full time. The second change is due directly to the feedback we’re seeing. This “inconsistency” in the model is exactly the path we’re taking. The way we‘re going to think about this that the UAC setting is something like a password, and to change your password you need to enter your old password.
The feedback is that UAC is special, because it can be used to disable silently future warnings if that change is not elevated and so to change the UAC setting an elevation will be required.* To the points in the comments, we also don’t want to create a sense or expectation of security that is not there—you should still not download code and run it unless you trust the source. HTML, EXE, VBS, BAT, CMD and more are all code and all have the potential to alter the environment (user settings, user files) running as a standard user or an administrator. We’re focused on helping people make sure that code doesn’t get on the machine without consent and many third party tools can help more as well. We want people to be comfortable with the new UAC control and the new default setting, so we’ll make the changes outlined above as the feedback has been clear.
While we’re discussing this we want to make sure we’re all on the same page going forward in terms of how we will evaluate the security of Windows 7. Aside from the UAC setting, the discussion of the vulnerability aspects of the Windows 7 Beta* have each started with getting code on the machine, which the mechanisms of Windows have prevented in the cases shown. We have also heard of security concerns that involve multiple steps to demonstrate a potential exploit. It is important to look at the first step—if the first step is “first get code running on the machine” then nothing after that is material, whether it is changing settings or anything else.* We will treat very seriously the ability to get code on a machine and run without consent. As Jon’s post highlighted briefly, the work in Windows 7 is about the increased protections in place to secure your PC from acquiring and running code without your consent, and of course we continue to make sure Windows code is secure from both tampering or circumventing the protections in the system.
We want to reiterate the security of the system overall. Windows 7 is SD3+C and is designed to be more secure that Vista—that’s our priority. None of us want to have Windows 7 be perceived as being less secure than Vista in any way, because our design point is to make sure it is more secure that Windows Vista, by default.
We said we thought we were bound to make a mistake in the process of designing and blogging about Windows 7. We want to continue the dialog and hopefully everyone recognizes that engineering, perhaps especially engineering Windows 7, is sometimes going to be a lively discussion with a broad spectrum of viewpoints expressed. We don’t want the discussion to stop being so lively or the viewpoints to stop being expressed, but we do want the chance to learn and to be honest about what we learned and hope for the same in return. This blog has almost been like building an extra product for us, and we’re having a fantastic experience. Let’s all get back to work and to the dialog about Engineering Windows 7. And of course most importantly, we will continue to hear all points of view and share our point of view and work together to deliver a Windows 7 product that we can all feel good about.
--Jon and Steven
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