Stefan Machherndl
Stefan Machherndl is a Junior Researcher at St.Pölten University of Applied Sciences, Austria. He is focusing on network technologies and cybersecurity. He is especially interested in cybersecurity competitions (CTFs), during these competitions he is using Wireshark for attack analysis and to solve forensic challenges.
Session
Modern operating systems ship with native IPv6 support and dual stack configurations enabled by default. While this is essential for comprehensive connectivity, it introduces subtle yet critical security risks - especially in environments still predominantly focusing on IPv4 and IPv4 security.
This talk provides an overview of dynamic IPv6 configuration options and explores how attackers can exploit IPv6 capabilities to compromise IPv4 networks. We will demonstrate how IPv6 features - such as SLAAC, Router Advertisements, and DHCPv6 - can be weaponized in dual stack setups. For this, we will use Wireshark to analyze different types of attacks and the corresponding behaviors of the targeted operating systems at the packet level. Finally, we will conclude our talk with recommended mitigation strategies for the identified issues.