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A database of Facebook users’ phone numbers found online

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Re: A database of Facebook users’ phone numbers found online

#11
post #8

proper link? I'm curious to see if I'm on there

Check Settings -> Privacy -> Who can look you up using the phone number you provided? If I understood this story correctly, it was scraped from accounts that had this preference set to public.

It can be scraped even when it's "Only people who you have in contacts" (can't recall the exact wording right now), Facebook thinks it's a feature and that their privacy measures are working properly.

Re: A database of Facebook users’ phone numbers found online

#12

Kinda curious how you never find those dumps by a normal search on Google, basically you have no way to know if your data is there if you don't know where to look. I don't use Facebook but I always suspected my data is there due to friends having me in their contacts and using their apps.

Security researchers use search engines like Shodan to find these databases, not Google.

Re: A database of Facebook users’ phone numbers found online

#16

Facebook: "This dataset is old and appears to have information obtained before we made changes last year to remove people’s ability to find others using their phone numbers." Not that "old." Some of those "update" dates are just a few days ago.

> changes last year to remove people’s ability to find others using their phone numbers. What? That's not true, I reported the issue about user enumeration via phone numbers being possible in Whatsapp, Messenger and Instagram to them last week and they claimed (paraphrased) "it's a feature, not a security issue".

Do you intend to publish this correspondence? I think some companies prefer to sue people using these "features" instead of changing them. It's a good thing to have on record.

Re: A database of Facebook users’ phone numbers found online

#17

It's clearly a mongo database. I'm curious if there was no password because mongo doesn't password protect by default or if it was intentionally left public.

My guess would be that it was setup by someone for test/dev and then it was forgotten about. I've found this to be a "time honored" problem heh.

Re: A database of Facebook users’ phone numbers found online

#18

Kinda curious how you never find those dumps by a normal search on Google, basically you have no way to know if your data is there if you don't know where to look. I don't use Facebook but I always suspected my data is there due to friends having me in their contacts and using their apps.

Google only really does http/https, finding mongodb requires scanning for 27019 and then pointing a client at it. I believe Shodan does this.

Re: A database of Facebook users’ phone numbers found online

#20
post #17

It's clearly a mongo database. I'm curious if there was no password because mongo doesn't password protect by default or if it was intentionally left public.

My guess would be that it was setup by someone for test/dev and then it was forgotten about. I've found this to be a "time honored" problem heh.

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