cross-posted from: https://lemmy.ca/post/37638868 !privacy@lemmy.dbzer0.com
This affects Signal too
An issue with Cloudflare allows an attacker to find which Cloudflare data center a messaging app used to cache an image, meaning an attacker can obtain the approximate location of Signal, Discord, Twitter/X, and likely other chat app users. In some cases an attacker only needs to send an image across the app, with the target not clicking it, to obtain their location.
https://gist.github.com/hackermondev/45a3cdfa52246f1d1201c1e8cdef6117?ref=404media.co
Signal, an open-source encrypted messaging service, is widely used by journalists and activists for its privacy features. Internally, the app utilizes two CDNs for serving content: cdn.signal.org (powered by CloudFront) for profile avatars and cdn2.signal.org (powered by Cloudflare) for message attachments.
How so? Asking out of curiosity.
I’m not trying to wear a tinfoil hat, but Snowden clearly revealed that the government is easily able to purchase cellphone location data based on GPS and tower data more easily than they can go through the FISA courts.
Ah, thought you meant though metadata. Like a end user snooping through some obscure meta data method (even after cleaning) let’s you triangulate something.
Your cellphone provider very likely already sells this data.
I know mine does, because I attended a webinar of a buying company where they explicitly mentioned this.