The system must implement non-executable program stacks.

From HP-UX 11.23 Security Technical Implementation Guide

Part of GEN003540

Associated with IA controls: ECCD-2, ECSC-1, ECCD-1

Associated with: CCI-000366

SV-35009r1_rule The system must implement non-executable program stacks.

Vulnerability discussion

A common type of exploit is the stack buffer overflow. An application receives, from an attacker, more data than it is prepared for and stores this information on its stack, writing beyond the space reserved for it. This can be designed to cause execution of the data written on the stack. One mechanism to mitigate this vulnerability is for the system to not allow the execution of instructions in sections of memory identified as part of the stack.

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Fix text

# kctune executable_stack=0 The system will require a restart/reboot for the setting to take effect.

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