NO, I don’t need web pages to have the ability to play with visited status — I can just think about online stores seeing what I’m buying from their competitors and utilizing that as commercial monitoring. Optimistically marking this bug as fixed, though I already know of some followup bugs that have to be filed. It’s not supposed to work, since that’s a change within the alpha part of the color. If you imagine there is a bug, could you file it as a separate bug report. It might be good to document no matter invariants this type context satisfies (e.g. the ones we assert in SetStyleIfVisited). I’m going to attach a sequence of patches that I imagine repair this bug.
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- Because outline does not transfer the content in any respect, it could only change a color.
- If the web page reads the construction, or does some rendering that is dependent upon visited state, the actual value within the structure wouldn’t be learn, and it might be spoofed as unvisited.
- I do not perceive that test fully, but it appears to involve accessing an information structure concerning the page.
I think the pref added by the patch is useful for a small fraction of customers, and perhaps for a larger variety of customers if security specialists inside or outdoors Mozilla explain the problem. Here’s a patch for a layout.css.visited_links_enabled pref, defaulting to true. In other phrases, trade some design potentialities for privateness, while keeping the total functionality of displaying visited links. For every visited URL, make a background request to a server that will fetch a replica of the URL and return a list of links on that page. 1) It would still be attainable for an attacker to construct a convincing phishing web page that looks like Wells Fargo to a Wells Fargo buyer and Citibank to a Citibank customer.
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This does slow down the attacker, however the attacker can nonetheless get personal data from each click on. Let’s say an internet page exhibits N hyperlinks that each one say “Click right here to proceed.” The unvisited hyperlinks are styled to mix in with the background so the person cannot see them. The visited hyperlinks are visible due to the visited link styling, so the user only see the visited ones. Then the attacker can find my freecams.com out where the person’s been by which hyperlink they click on. Please, give users again the ability to style visited links’ text-decoration, opacity, cursor and the rest of css-properties that we could harmlessly spoof. I don’t perceive that take a look at fully, but it seems to involve accessing an information construction concerning the web page.
Comment 215
I can change forwards and backwards between teacher view, demonstration camera, audience view, presentation slide deck or video, etc… and it’s seamless. In a nutshell, it actually lets me showcase the content material with out requiring costly expertise and having the technology control what can happen. This could additionally be manually corrected, nevertheless, in Logitech’s simple digicam settings software, which lets you administration the color intensity and white steadiness. What used to take a Tricaster/Video Toaster setup can now be done in software program program using a daily PC. I can change forwards and backwards between trainer view, demonstration digicam, viewers view, presentation slide deck or video, etc… and it is seamless. I’d also prefer to avoid using fallback colors in circumstances the place they weren’t earlier than .
Protect Your Privacy, One Search At A Time
Certainly the most secure path, and the easiest to implement, but once more, we lose the performance of understanding whether they’re visited or not… Then I assume we have to take a non-CSS approach to fixing this, such as storing all referring domains to a link in world historical past, and only permitting styling if the page is within the referring area. It is true that these proposed modifications make assaults harder and are prone to work properly with most sites. Although I help these modifications, I wish to level out that they do not repair all of the recognized exploits.
I was speaking to Sai about this and he suggested I make a remark right here — so I have not read through and understood the current state of dialogue, apologies. Those are each detectable through efficiency characteristics. Allowing them to be set wouldn’t repair the exploit in any helpful method.
Maybe, as an example, the antialiaser displays some delicate dependency from colour to dimension, characters of a more contrasting shade having a tiny tiny subpixel distinction in width — voila, security gap. I don’t know, past that enormous numbers of sites distinguish visited hyperlinks based mostly on colours. I’m interested to see what links I’ve visited, however I do not care about fancy styles. A different colour for visited links is sufficient, and if a web page queries the colour it could be advised the unvisited colour, or if the data type allows, it may be advised both colors.
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Comment 85
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Remark Ninety Eight
Plus we might spend lots of time on backporting as an alternative of of engaged on performance or different features. So as I mentioned it is a query of trade-offs, which are by no means straightforward. This is why it considerations me that there appear to be no plans to backport the fix as far as I was able to find out.
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To break this feature is breaking one of the most useful visual feedback aspects of an online browser. The content on a web page should not be in a place to read the precise colour of hyperlinks. But then if the reads of individual pixels effect rendering you get a recursive drawback and it would take a huge amount of assets to fully render. 2) It would still be potential for an attacker to study information about the consumer’s historical past at other websites based on where they click on and don’t click. For example, and attacker could have a huge hyperlink that claims “Click here” and solely customers with a certain historical past entry would see it and click on on it because it blends in with the background in any other case.
Another fascinating thing that can be done since bug was mounted is to know in actual time when someone clicks on a link. For instance, you would visit a page that did the type of monitoring described above, then maintain it open in a background tab. If I click on a narrative on slashdot that I’ve not read before, that hyperlink will immediately turn out to be ‘visited’ on the monitoring page.
I do not suppose this may essentially at all times be the case, although in some circumstances I suspect it’d nicely be (and observe you shouldn’t consider my assertions as authoritative). In the first case it’s a privateness violation, which we normally classify as distinct from safety concern. Sounds like you want layout.css.visited_links_enabled , which has been round for some time . It’s performance-sensitive code, and it might be run at times when it is inappropriate to name into script. However, if we add support for pointer-events values that make hit testing rely upon pixel transparency, then elementFromPoint could be used to check transparency, and hence color.