CVE-2024-6387: Critical OpenSSH Vulnerability Allowing Root Access

The Qualys Threat Research Unit (TRU) has uncovered CVE-2024-6387, a serious vulnerability in OpenSSH running on glibc-based Linux systems. This unauthenticated Remote Code Execution (RCE) flaw lets attackers gain full root access in the default configuration, without any user interaction. What makes CVE-2024-6387 especially dangerous is that it’s not a brand-new bug. Instead, it’s a regression of CVE-2006-5051, a vulnerability patched nearly two decades ago but accidentally reintroduced in OpenSSH 8.5p1 (October 2020). Why CVE-2024-6387 Matters OpenSSH is one of the most widely used components in Linux infrastructure. A flaw in its default configuration means millions of servers could be exposed, cloud providers, enterprise systems, and even critical infrastructure. Because attackers don’t need valid credentials or user interaction, exploitation risk is extremely high. This makes it vital to understand which versions are affected and how to quickly detect vulnerable deployments before