Quantifying the Impact of "Cloudbleed"

This post details the analysis of the "Cloudbleed" bug, a memory leak in Cloudflare's parser that exposed customer data. It explains how the bug was triggered by specific HTML flaws and enabled Cloudflare features, the code path involved, and the timeline of its exposure and patching. The post quantifies the impact by analyzing logs, finding no evidence of malicious exploitation before patching, and identifying that while internal headers and cookies were leaked, no passwords, credit card numbers, or health records were found in the reviewed data. It also outlines the methodology used to search for malicious exploitation patterns.