Posted by Red Nanaki via Fulldisclosure on Jul 02

OpenBlow Multiple Deanonymization Vulnerabilities

Summary

A production deployment was observed (HTTP archive of a full, real whistleblower
submission) to route its anonymous reporting flow through Google. The intake
CAPTCHA is Google reCAPTCHA, enforced as a mandatory, server-validated gate
on report submission, and the UI additionally pulls a web font from
fonts.gstatic.com. As a result, every prospective whistleblower’s browser
makes…