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105

Cloudflare Issue Can Leak Chat App Users' Broad Location (www.404media.co)

submitted 1 day ago* (last edited 1 day ago) by [email protected] to c/[email protected]

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cross-posted from: https://lemmy.ca/post/37638868 [email protected]

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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[–] [email protected] 11 points 1 day ago

Agreed. Privacy is always a balance between your threat model and useability. If your general location is enough to put you in danger, hopefully you're already aware of how your data is being sent over the various networks and have measures in place to stay safe.

For most people, knowing very generally where they are isn't especially useful information to anyone with an interest in surveillance.