Make the kernel text and rodata read-only
An XCCDF Rule
Description
When set, kernel text and rodata memory will be made read-only, and non-text memory will be made non-executable.
This configuration is available from kernel 4.11.
The configuration that was used to build kernel is available at /boot/config-*.
To check the configuration value for CONFIG_STRICT_KERNEL_RWX, run the following command:
grep CONFIG_STRICT_KERNEL_RWX /boot/config-*
For each kernel installed, a line with value "y" should be returned.
warning alert: Warning
There is no remediation for this besides re-compiling the kernel with the appropriate value for the config.
Rationale
This provides protection against certain security exploits (e.g. executing the heap or modifying text)
- ID
- xccdf_org.ssgproject.content_rule_kernel_config_strict_kernel_rwx
- Severity
- Medium
- References
- Updated