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Bumble and Hinge allowed stalkers to pinpoint users’ locations down to 2 meters, researchers say (techcrunch.com)

submitted 3 months ago by ForgottenFlux@lemmy.world to c/technology@lemmy.world

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In a new academic paper, researchers from the Belgian university KU Leuven detailed their findings when they analyzed 15 popular dating apps. Of those, Badoo, Bumble, Grindr, happn, Hinge and Hily all had the same vulnerability that could have helped a malicious user to identify the near-exact location of another user, according to the researchers.

While neither of those apps share exact locations when displaying the distance between users on their profiles, they did use exact locations for the “filters” feature of the apps. Generally speaking, by using filters, users can tailor their search for a partner based on criteria like age, height, what type of relationship they are looking for and, crucially, distance.

To pinpoint the exact location of a target user, the researchers used a novel technique they call “oracle trilateration.”

The good news is that all the apps that had these issues, and that the researchers reached out to, have now changed how distance filters work and are not vulnerable to the oracle trilateration technique.

Neither Badoo, which is owned by Bumble, nor Hinge responded to a request for comment.

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[–] doctortran@lemm.ee 12 points 3 months ago* (last edited 3 months ago) (2 children)

Seems weird to include Grindr with all the others, given Grindr is an actual radar. The whole point is that you're supposed to be able to see who's near. At about a thousand feet, the distance starts getting murky and obfuscated, but still, you're supposed to be able to know when somebody is close, down to a couple hundred feet.

In that case, at least, the user base knows what they're getting into when they use the app.

[–] Zerfallen@lemmy.world 7 points 3 months ago* (last edited 3 months ago) (1 children)

Grindr reports down to single digit metres... That level of accuracy is certainly not needed and potentially dangerous. I've had stalker issues with Grindr before.... Imo the radar aspect can be preserved while simply capping the accuracy or reporting at "<500m", because seriously that's close enough to know someone is literally less than 5 minute walk from you.

Sniffies is a similar app, but includes an option to randomise your location within a certain radius that you can set. So you can still determine people are "nearby" or get an idea of their general distance and location, without being able to literally hunt them down.

[–] werefreeatlast@lemmy.world 1 points 3 months ago

I don't understand why people use Sniffles anymore. They used to allow you to post comments while not paying. Now you gotta pay up for everything. It's not stupid for them but it means that if you want to find someone to 💕 love 😘, 💞, you gotta give someone else money. That makes no sense to me whatsoever. I propose that the entire community create icons with numbers...like number 234... Put it on the sniffies AP as your icon, and then come over to a local Lemmy instance and talk away. It's ridiculous to have to pay for love. WTF!

[–] ivanafterall@lemmy.world 3 points 3 months ago* (last edited 3 months ago)

Dang, I didn't know that. That's cool. I can see how that might be problematic on Tinder, etc... but it'd be pretty neat.