Users of Windows Vista and Windows 7 have been advised to completely
disable their Windows Sidebar and Gadgets, in response to what appears
to be a serious security risk.
The Windows Sidebar is a vertical bar that can appear at the side of
your desktop, containing mini-programs (known as gadgets) that can
provide a number of functions such as a clock, the latest news
headlines, weather report and so forth.
A
security advisory
issued by Microsoft's security team advises that vulnerabilities exist
that could allow malicious code to be executed via the Windows Sidebar
when running insecure Gadgets.
The warning comes ahead of a talk scheduled for Black Hat later this
month by Mickey Shkatov and Toby Kohlenberg. Shkatov and Kohlenberg's
talk, entitled "We have you by the gadgets", threatens to expose various
attack vectors against gadgets, how malicious gadgets can be created,
and the flaws they have found in published gadgets.
"We will be talking about our research into creating
malicious gadgets, misappropriating legitimate gadgets and the sorts of
flaws we have found in published gadgets."
If the researchers have managed to find ways to exploit existing gadgets that's particularly worrying.
Clearly Microsoft is worried about the security researchers' findings, and has issued a
"Fix It Tool" which will protect Windows 7 and Vista users by entirely disabling the Windows Sidebar and Gadgets functionality.
Yes, that's right. Microsoft hasn't issued a security patch to fix
the vulnerability. They're suggesting you completely nuke your Windows
Sidebar and Gadgets.
Which is bad news if you found those sidebar gadgets useful. You
better find a new way to tell what time it is, or catch the latest from
your favourite RSS feeds.
Sorry if it causes you any pain, but I would recommend you follow
Microsoft's advice if you run Windows 7 or Vista and apply their "Fix It
tool" as soon as possible. It may be a sledgehammer to crack a nut -
but it's a nut that needs smashing, and fast.
Interestingly, Microsoft has dropped Gadgets from the upcoming Windows 8. In retrospect, that was probably a very good idea.