The system must implement non-executable program stacks.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-11999	GEN003540	SV-27412r1_rule	ECCD-1 ECCD-2 ECSC-1	Medium

Description
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.

Description

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.

STIG	Date
Solaris 9 X86 Security Technical Implementation Guide	2013-07-02

Details

Check Text ( C-28598r1_chk )
Determine if the system implements non-executable program stacks. # grep noexec_user_stack /etc/system If the noexec_user_stack is not set to 1, this is a finding.

Fix Text (F-24684r1_fix)
Edit /etc/system and set the noexec_user_stack parameter to 1. Restart the system for the setting to take effect.