Gerben Kleijn

Gerben Kleijn

Gerben Kleijn (OSCP, CISSP) is a Managing Security Associate for Bishop Fox, where he primarily focuses on external network penetration tests and web application assessments, as well as cloud deployment reviews for Amazon Web Services (AWS). He has advised Fortune 500 brands and startups in industries such as media, retail, and software in addition to popular websites, credit reporting agencies, and marketing platforms.

Recent Posts by Gerben Kleijn:

In 2018, Spencer Gietzen identified 21 methods across various AWS services that could lead to privilege escalation. Since then, I’ve often referred to Spencer’s article during engagements as I look …

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Amazon Web Services (AWS) isn’t the novelty it was a decade ago. Resource-intensive, computer-heavy work today flows upward from giant enterprises 24/7 to the nebulous cloud where its processed by …

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Avoid Common Mistakes When Deploying Cloud-based Services Download the full PDF guide here The Threat of Poor AWS S3 Buckets Security If your organization uses Amazon Web Services (AWS), it …

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