Linked by Thom Holwerda on Sat 31st Jan 2009 10:45 UTC
Privacy, Security, Encryption Yesterday, we reported on the security flaw in Windows 7's UAC slider dialog, and today, Microsoft has given a response to the situation, but it doesn't seem like the company intends to fix it. "This is not a vulnerability. The intent of the default configuration of UAC is that users don't get prompted when making changes to Windows settings. This includes changing the UAC prompting level." I hope this reply came from a marketing drone, because if they intend on keeping this behaviour as-is in Windows 7 RTM, they're going to face a serious shitstorm - and rightfully so. Let's hope the Sinfoskies and Larson-Greens at Microsoft rectify this situation as soon as possible.
Thread beginning with comment 346363
To view parent comment, click here.
To read all comments associated with this story, please click here.
RE: Not that serious
by Thom_Holwerda on Sat 31st Jan 2009 14:10 UTC in reply to "Not that serious"
Thom_Holwerda
Member since:
2005-06-29

People seem to overlook the fact that, for this to even propagate in the first place, the user needs to have execution privileges on the system already.


This simple technique works on every admin account, and seeing most home users are still admins, this is a very serious security issue.

Reply Parent Score: 2

RE[2]: Not that serious
by Nelson on Sat 31st Jan 2009 14:31 in reply to "RE: Not that serious"
Nelson Member since:
2005-11-29

UAC still prompts for elevation on Administrator accounts.

Try it.

Reply Parent Score: 1

RE[3]: Not that serious
by Thom_Holwerda on Sat 31st Jan 2009 14:38 in reply to "RE[2]: Not that serious"
Thom_Holwerda Member since:
2005-06-29

UAC still prompts for elevation on Administrator accounts.


Ah, I see you don't get what this flaw is about.

The problem is that the in the default setting for Windows 7, changes to Windows' settings DO NOT trigger UAC - and this INCLUDES the slider for UAC.

In other words, on admin accounts, with Windows 7's DEFAULT UAC settings, you can maliciously disable UAC without the user ever seeing any prompt whatsoever.

Get it now?

Reply Parent Score: 2