Corelight Bright Ideas Blog

This month’s Microsoft Patch Tuesday included a severe Remote Code Execution vulnerability in the way that Windows TCP/IP handles IPv6 “Router Advertisement” ICMP messages. Due to the severity and wide scope, we in Corelight Labs immediately set... Read more »

More than 15 years after Gartner declared that “IDS is dead” because it was too noisy to be effectively managed, alert fatigue continues to be a central theme of life in modern SOCs, with a majority of SOCs still unable to process all the alerts... Read more »

The past few weeks have seen several developments around Community ID, our open standard for rendering network traffic flow tuples into a concise textual representation. I’d like to summarize them in this blog post. Read more »

I often develop packages for Zeek in cluster mode. In this configuration, it can be difficult to debug your package because it is a continually running environment with real, and often unpredictable, network data. If you add to that other packages... Read more »

CVE-2020-1472 aka Zerologon, disclosed by Tom Tervoort of Secura, is an illustrative case study of how a small implementation mistake in cryptographic routines cascades into a privilege escalation vulnerability that allows an attacker to change the... Read more »

This summer, Corelight hosted a virtual CTF tournament where hundreds of players raced to solve security challenges using Zeek data in Splunk and Elastic. After the preliminary rounds, we invited the top performers back for a champions round and... Read more »

This post contains a warning and a solution for anyone using BPF syntax when filtering traffic for network security monitoring. Read more »

“There is an open approach that is currently rippling across the infosec industry that could give defenders the acceleration they need.” – John Lambert (Distinguished Engineer, Microsoft) Read more »