OL 9 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271761 | OL09-00-002423 | SV-271761r1091995_rule | Medium |
| Description |
| ASLR makes it more difficult for an attacker to predict the location of attack code they have introduced into a process' address space during an attempt at exploitation. Additionally, ASLR makes it more difficult for an attacker to know the location of existing code to repurpose it using return-oriented programming (ROP) techniques. |
| STIG | Date |
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 |
Details
| Check Text (C-75811r1091993_chk) |
| Verify that OL 9 is implementing ASLR with the following command: $ sysctl kernel.randomize_va_space kernel.randomize_va_space = 2 If "kernel.randomize_va_space" is not set to "2" or is missing, this is a finding. |
| Fix Text (F-75718r1091994_fix) |
| Configure OL 9 to implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution. Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: kernel.randomize_va_space = 2 Reload settings from all system configuration files with the following command: $ sudo sysctl --system |