Re:TeamViewer installs suspicious font only useful for web f...
by mwcampbell on Wednesday July 20, 2022 @09:40AM
(#32165639)
But can JavaScript check whether the protocol handler is installed? Or can it only attempt to use the protocol handler, then give the user if-then-else instructions to manually handle the case where it's not installed? Remember, a remote support product has to assume that the user receiving support doesn't have the knowledge or energy to go through a complex setup process, which is presumably a digression from whatever problem they were having in the first place.
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Re:TeamViewer installs suspicious font only useful for web f...
by alex_suzuki on Wednesday July 20, 2022 @09:51AM
(#32165785)
It cannot. Enumerating protocol handlers is actually an excellent fingerprinting technique. That’s why platforms like iOS for instance forbid it, or you have to explicitly specify which ones you’ll query (see: https://developer.apple.com/documentation/uikit/uiapplicatio...).