Enable page allocator poisoning
An XCCDF Rule
Description
To enable poisoning of free pages, add the argument page_poison=1 to all
BLS (Boot Loader Specification) entries ('options' line) for the Linux
operating system in /boot/loader/entries/*.conf.
Rationale
Poisoning writes an arbitrary value to freed pages, so any modification or reference to that page after being freed or before being initialized will be detected and prevented. This prevents many types of use-after-free vulnerabilities at little performance cost. Also prevents leak of data and detection of corrupted memory.
- ID
- xccdf_org.ssgproject.content_rule_coreos_page_poison_kernel_argument
- Severity
- Medium
- References
- Updated
Remediation - Kubernetes Patch
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
spec:
config:
ignition: