Understanding and Defending Against OS Command Injection in systeminformation's networkInterfaces()
This educational analysis delves into a critical vulnerability in the systeminformation library, specifically in the networkInterfaces() function on Linux systems. The vulnerability allows for OS command injection through the Debian/Ubuntu interfaces(5) source directive, enabling an attacker to execute arbitrary commands with the privileges of the calling Node.js process. We will explore the root cause, attack surface, exploitation mechanics, and provide defensive strategies to mitigate this threat.