https://my-it-blog.netlify.app/tags/grub/ Recent content in Grub on My IT Journal Hugo en-us Thu, 11 Jun 2026 00:00:00 +0000 https://my-it-blog.netlify.app/posts/grub-security-lab/ Thu, 11 Jun 2026 00:00:00 +0000 https://my-it-blog.netlify.app/posts/grub-security-lab/ <h2 id="attack-simulation-gaining-root-access-via-grub">Attack Simulation: Gaining Root Access via GRUB</h2> <h3 id="objective">Objective</h3> <p>Demonstrate how physical access to a Linux system can be abused to gain root privileges by modifying GRUB boot parameters.</p> <hr> <h2 id="prerequisites">Prerequisites</h2> <ul> <li>OS: Linux Ubuntu</li> <li>Access to GRUB menu during boot</li> <li>No GRUB password protection enabled</li> </ul> <hr> <h2 id="attack-steps">Attack Steps</h2> <ol> <li>Reboot the system and access the GRUB menu.</li> <li>Select the default Linux entry and press e to edit boot parameters.</li> <li>Locate the line starting with: linux /boot/vmlinuz-&hellip;</li> <li>Modify the line</li> <li>Boot the modified entry using Ctrl + X</li> </ol> <p><img alt="grub_systemd" loading="lazy" src="https://my-it-blog.netlify.app/posts/grub-security-lab/grub_systemd.png"></p>