Business Logic Vulnerabilities Series: A Story of a 4-Years-old (and counting) Facebook Security Bug!

Hi Guys,
I am Ali Kabeel an Application Security Intern at Seekurity team. This is Second part of A brief on Abusing Invitation Systems blog post . In this blog post I will be mainly focusing on how I was able “by following the tips and tricks in the previous blog post” to bypass Facebook fixes for 4 consecutive years.In case you are not familiar with concepts, take a sneak peak on the previous blog before continuing with this one ;).

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The Fuzz…The Bug..The Action – A Race Condition bug in Facebook Chat Groups leads to spy on conversations!

Hi Folks, Long time no see, it’s Seif Elsallamy, Remember me ? if not 🙁 you may go through my previous blogs Stored XSS in the heart of the Russian email provider giant (Mail.ru)  ,  Rolling around and Bypassing Facebook’s Linkshim protection on iOS

Today I’m gonna show you a race condition bug which i recently fall in love with those kind of vulnerabilities especially in when it comes to Facebook also i want to mention that this bug is super simple to understand It’s not complicated, the only complicated part is how to test and finding it.

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