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XCCDF
Red Hat Enterprise Linux 8 Security Technical Implementation Guide
SRG-OS-000134-GPOS-00068
RHEL 8 must clear the page allocator to prevent use-after-free attacks.
RHEL 8 must clear the page allocator to prevent use-after-free attacks.
An XCCDF Rule
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RHEL 8 must clear the page allocator to prevent use-after-free attacks.
Medium Severity
<VulnDiscussion>Some adversaries launch attacks with the intent of executing code in non-executable 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 be either hardware-enforced or software-enforced with hardware providing the greater strength of mechanism. 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. Satisfies: SRG-OS-000134-GPOS-00068, SRG-OS-000433-GPOS-00192</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>