Stack Protector buffer overlow detection
An XCCDF Rule
Description
This feature puts, at the beginning of functions, a canary value on the stack just before the
return address, and validates the value just before actually returning.
This configuration is available from kernel 4.18.
The configuration that was used to build kernel is available at /boot/config-*.
To check the configuration value for CONFIG_STACKPROTECTOR, run the following command:
grep CONFIG_STACKPROTECTOR /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 halts the program when a stack overflow is detected, potentially reducing the impact of exploits.
- ID
- xccdf_org.ssgproject.content_rule_kernel_config_stackprotector
- Severity
- Medium
- References
- Updated