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Assurance Security Manager
Oleksandr is a seasoned cybersecurity professional driven by a fervor for offensive security. With a track record of leading impactful engagements spanning diverse industries, he excels in assisting clients in pinpointing and remedying critical security vulnerabilities within their systems and infrastructure. As the Offensive Security Manager at Storebrand, Oleksandr has played a pivotal role in cultivating and overseeing a robust red team program. This initiative has significantly contributed to enhancing Storebrand's security posture and providing a comprehensive understanding of its risks and vulnerabilities. Combining his background in software engineering with a profound knowledge of offensive tactics, Oleksandr is uniquely positioned to guide organizations in adopting contemporary and efficient defensive/offensive security practices.
DNS is one of the most trusted components of modern cloud infrastructure, yet a simple configuration mistake can silently hand control of a subdomain to an attacker. Dangling nameserver delegations are often dismissed as expected DNS behavior, making them difficult to detect and easy to overlook.
In this talk, we demonstrate how abandoned or misconfigured nameserver delegations can be abused to take over trusted subdomains across major cloud providers. Drawing on research conducted across organizations from various industries and institutions in both the Nordic region and internationally, we show how these issues persist in real-world environments and why they remain a challenge for platform and security teams.
Attendees will learn how dangling NS delegations occur, what impact they can have on cloud-native architectures, and how to identify and eliminate them before they become a security incident.
