Heartbeat Havoc: Unveiling Remote Vulnerabilities in Windows Network Load Balancing

The Network Load Balancing (NLB) feature distributes traffic across several servers by using the TCP/IP networking protocol. By combining two or more computers that are running applications into a single virtual cluster, NLB provides reliability and performance for web servers and other mission-critical servers. One of the core features of NLB is the Heartbeat. Servers emit a heartbeat message to other hosts in the cluster and listen for the heartbeat of other hosts. If a host fails, the remaining hosts adjust and redistribute the workload. This session focuses on the security analysis of Windows Network Load Balancing (NLB). We'll dig into the internal details of NLB's HeartBeat feature and cover the various types of zero-click bugs we've found,including integer overflows, race conditions, out-of-bounds read and write, memory leaks, use after free, and null pointer dereferences. Attackers can exploit these vulnerabilities to achieve remote code execution or launch denial-of-service attacks against the target NLB cluster. Additionally, we will introduce other noteworthy cases, which, while not officially recognized, still pose a potential threat to the stability of NLB services. Finally, we will show the triggering effects of related vulnerabilities and mitigation suggestions. By: b2ahex . | Security Researcher Yifen Ma | Security Engineer Greenbamboo C | Security Researcher Haotian Jiang | Security Researcher Full Abstract and Presentation Materials: https://ift.tt/oH0vGPJ

source https://www.youtube.com/watch?v=T0x--ahWyoo