~/talk

How I Could Have Stolen Your Photos From Google

Talkat OWASP Global AppSec Amsterdam 2019 · on Friday, 2019-09-27· at 16:05· D203, RAI· [security, web-platform]
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Finds a Gmail invite parameter that accepts multiple emails with a crafted display name to spoof addresses and earns $500; discovers Google Slides exposes Drive image URLs via two API calls where a returned random token ties to an image ID allowing retrieval (direct object reference), also $500 and labeled priority one; breaks Google Photos shared-libraries by decoding a URL-safe Base64 token (replace dot with =) to swap the partner email and silently share albums, gets ~$3,000; uses Chrome DevTools and curl and notepad, brute force of long IDs is impractical but exploits work.

AI-written summary · about

  1. 0:00Start
  2. 1:54TABLE OF CONTENTS
  3. 14:09TAKING A BREAK
  4. 17:16UNIQUE SHARING MECHANISM
  5. 23:04LESSONS LEARNED
  6. 24:26QUESTIONS
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