🔒 Critical CVE-2024-1086 Remediation Script This script ensures that your system is safeguarded against potential exploits by effectively disabling user namespaces and nf_tables, thereby mitigating the risks associated with this vulnerability. 🔍 How the Script Works: Disabling User Namespaces: The script first checks if user namespaces are enabled using sysctl -n kernel.unprivileged_userns_clone. If enabled, it sets kernel.unprivileged_userns_clone to 0, effectively disabling user namespaces. This change is also made persistent by updating /etc/sysctl.conf. Disabling nf_tables: It verifies if nf_tables is enabled by inspecting the kernel configuration. If enabled, it modifies the GRUB boot parameters to disable nf_tables by adding nftables.disable=1 and updates the GRUB configuration. Verifying Changes: The script confirms that user namespaces are disabled and nf_tables is not enabled in the kernel configuration, ensuring the system is secure. Error Handling: Robust error handling is included to catch any issues during script execution, providing clear feedback and exiting with an error status if necessary. ⚠️ Why It Matters: CVE-2024-1086 is a critical vulnerability that poses a significant risk to your systems by allowing attackers to exploit user namespaces and nf_tables for unauthorized access and malicious activities. Implementing this remediation script is crucial for the following reasons: Preventing Privilege Escalation: By disabling user namespaces, the script prevents potential privilege escalation exploits that could give attackers control over the system. Mitigating Network Attacks: Disabling nf_tables helps protect against network-based attacks, ensuring your system's network traffic cannot be maliciously manipulated. References: https://ubuntu.com/security/CVE-2024-1086 Stay safe.