A 15-year-old hacker, identified as Daniel, developed a tool called Cloudflare Teleport that exploited Cloudflare's content delivery network (CDN) to approximate user locations in apps like Signal and Discord. By leveraging CDNs' caching behavior, Daniel demonstrated that attackers could narrow down users' locations to within 200 miles. Although Cloudflare has patched the specific bug exploited, the core issue remains. The incident highlights critical implications for user privacy, indicating that apps relying on CDNs may inadvertently compromise anonymity by revealing general geographic information of their users.
Daniel's discovery emphasizes that while exact locations can't be pinpointed, CDN usage allows attackers to locate users within a 200-mile radius, posing significant privacy risks.
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