Optimistically marking this bug as fastened, though I already know of some followup bugs that need to be filed. It’s not supposed to work, since that’s a change within the alpha part of the colour. If you imagine there is a bug, could you file it as a separate bug report.
- This could be useful to reposition a CSS sprite picture depending on the visited state.
- Firefox will be the only browser that might be capable of blocking this exploit then.
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- A patch like this could actually undergo a full beta cycle and by the time we went by way of that course of it might look extra like the Firefox 4 time frame.
- For typical pages, “noticeably slower pageload” expensive, if I recall the numbers proper for what number of history lookups occur.
Leaking a number of bits slowly can leak enough over time to compromise delicate secrets and techniques. It should be the default, even though it breaks the spec, because individuals should not have their privateness violated except they agree, even when a specification says they should. If I am on a website A and I click on a hyperlink to a different website B, it will be nice if any hyperlink to B can be seen as “visited” by A. What do you consider restrict the visibility of “visited” for a website A to different domains that have been visited having A as referer? I assume it is a bit higher that just limiting it to identical area. Last time I checked, Places lookups weren’t the quickest thing on earth.
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Are you sure that you had actually entered the non-public searching mode? If you had, your window title should have had “” at its end, however in the screenshot that you have got posted, that is not the case. OK, then maybe we should not be involved about any cross-site data leaks … If a consumer distrusts a website, he’ll use personal shopping mode. 2) It would nonetheless be attainable for an attacker to learn information about the person’s history at different websites based on where they click and don’t click. For instance, and attacker could have a huge link that says “Click right here” and only customers with a sure history entry would see it and click on on it as a outcome of it blends in with the background otherwise. 1) It would still be attainable for an attacker to assemble a convincing phishing web page that looks like Wells Fargo to a Wells Fargo customer and Citibank to a Citibank buyer.
I’m going to attach a series of patches that I imagine repair this bug. Once you may have carried out that, you probably can go on implementing some fancy same-origin-policy approach, SafeHistory, SafeCache, no matter. What I see from the user perspective is a critical, severe privateness issue.
Video And Screenshot
But then if the reads of individual pixels effect rendering you get a recursive downside and it’d take an enormous quantity of assets to completely render. With retail POS additionally now supported, CCBill can adequately cowl a enterprise that makes product sales each on- and offline. In that episode of The Lucy Show the place Lucy and Vivian go to the picture present to see Alain Resnais’ Last Year at Marienbad and set off a craze for Deconstruction all throughout America 1962.
Michael, Firefox 3.6 is EOL , i.e. not even important security holes will be fastened anymore. Yes, that’s upsetting in your case of PowerPC Mac, however this bug is not the proper forum for that query. I do not have the time now to work on this extra, but you can fork my code above to test this text-decoration problem.
This does slow down the attacker, but the attacker can still get private data from each click on. Let’s say an internet web page shows N hyperlinks that each one say “Click here to continue.” The unvisited hyperlinks are styled to blend in with the background so the user can’t see them. The visited hyperlinks are visible due to the visited link styling, so the consumer only see the visited ones. Then the attacker can discover out the place the consumer’s been by which hyperlink they click on. Please, give users again the flexibility to fashion visited hyperlinks’ text-decoration, opacity, cursor and the rest of css-properties that we might harmlessly spoof. I do not understand that check totally, but it seems to involve accessing a data construction about the page. I do not see why there could be a timing vulnerability involving the cache, but if there’s it could possibly probably be compensated for.
Comment 65
If the web page reads the structure, or does some rendering that is determined by visited state, the precise value in the construction wouldn’t be learn, and it will be spoofed as unvisited. The final stage of adding hyperlink colour would be after the web page had completed rendering (into non-display memory), so it will be more difficult to time. I’m undecided if by protected shopping mode you are referring to personal shopping mode or not, but when that is the case, we already do that.
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This could be useful to reposition a CSS sprite image depending on the visited state. E.g. make the colour of a decorative “arrow” image match the textual content shade. Safari does not run no script, has it’s own issues, would not assist plenty of plug-ins. TenFourFox has its personal share of compatibility issues (but in fairness, with google dropping offline mail, the biggest is going away.) Etc. NO, I don’t need web sites to find a way to play with visited status — I can just think about online shops seeing what I’m buying from their competition and utilizing that as commercial tracking. Perf distinction may be brought on solely by adjustments in component’s positioning, and text-decoration can have an effect on it nohow.
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It might then observe me as I look at a wikipedia web page linked from the comments, and any subsequent pages linked from there. Oh, why did you block the flexibility to set text-decoration, opacity and cursor for the visited links? They can’t move any parts on the page, and the values for these properties, that get sent to the location – we might spoof them so the location will not know whether we had visited any hyperlinks on that website earlier than. Anyway, I discover one property of the “restrict CSS properties of visited hyperlinks to paint and so on.” very sketchy, specifically that it abruptly turns into a _security-critical behaviour_ that shade not affect measurement or different properties of links.
It’s a sensible assumption, to make sure, however I might definitely think about some model of some OS breaking it. Maybe, for example, the antialiaser reveals some refined dependency from color to dimension, characters of a extra contrasting color having a tiny tiny subpixel difference in width — voila, safety hole. It’s not likely a bug in Firefox it is a bug in the HTML spec that ought to be closed but in the imply time this QAD resolution works simply fantastic.