Linux Security Features

If you’re managing a Linux environment, on-prem or in the cloud, chances are you’ve already tangled with questions of network security: firewalls, SSH hardening , package integrity checks ” all the usual suspects. But Virtual Private Networks (VPNs)?

Ever wonder how a seemingly minor bug in memory management can crack open a door for attackers to slip through? Meet the use-after-free (UAF) vulnerability”an elusive and dangerous class of memory corruption flaw that has plagued Linux systems (and others) for years.

DEFCON isn’t your average tech conference. It’s not about launching flashy products or corporate handshakes”it’s about putting reality under a microscope and asking big, uncomfortable questions. This year, the 2025 DEFCON hacking conference had a sharp focus: securing the digital backbone of the nation. And let’s be honest, seeing how razor-thin those defenses sometimes are when stacked against evolving threats can make even the most seasoned sysadmin bite their nails.

CSRF, or Cross-Site Request Forgery , is one of those vulnerabilities that’s deceptively simple but can wreak havoc if left unaddressed. Think about it: your users are logged into a web interface”maybe an admin portal for monitoring, a hosted application, or an internal management dashboard. Now imagine an attacker tricking that user”or their browser”into making unintended requests, like issuing commands, changing configurations, or transferring sensitive data. The scary part? It’s all done without the user even realizing it.