Address space layout randomization (ASLR) must be implemented by SLEM 5 to protect memory from unauthorized code execution.
An XCCDF Rule
Description
<VulnDiscussion>Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address space layout randomization. Data execution prevention safeguards can either be hardware enforced or software enforced, with hardware providing the greater strength of mechanism. Examples of attacks are buffer overflow attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-261271r996306_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure SLEM 5 to implement ASLR by running the following command as an administrator:
> sudo sysctl -w kernel.randomize_va_space=2
If "2" is not the system's default value, add or update the following line in "/etc/sysctl.d/99-stig.conf":