this post was submitted on 21 Jan 2025
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127
Cloudflare Issue Can Leak Chat App Users' Broad Location (www.404media.co)
submitted 2 days ago* (last edited 2 days ago) by otter@lemmy.ca to c/technology@lemmy.world
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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.

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[–] melroy@kbin.melroy.org 2 points 21 hours ago

Sorry to see so many people still down vote me. What is wrong with you? The internet has become a joke. Moving all to cloudflare will only make the problem worse.