3 ms·
Can this be used to gain some informations about the content of a webpage, with a timing attack ? Searching a phrase on a webpage will be faster when the phras
by fooyc 8y ago
Can this be used to gain some informations about the content of a webpage, with a timing attack ?
Searching a phrase on a webpage will be faster when the phrase exists, on average. If this timing is observable, this could be exploited to guess the content of a web page.
Someone did this already with selector-based anchors: https://blog.sheddow.xyz/css-timing-attack/ https://blog.sheddow.xyz/css-timing-attack/
- bokan 8y agoFeature author here. The CSS timing attack actually influenced the design process heavily. The original design was to use a stripped down CSS selector but we found this too large of an attack surface. There's definitely still concerns around making sure a 3rd party can't exfiltrate information from the page using this but we think we've found a set of restrictions that should prevent this: https://github.com/bokand/ScrollToTextFragment#security https://github.com/bokand/ScrollToTextFragment#security