The system must implement non-executable program stacks.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-48025	SOL-11.1-080020	SV-60897r1_rule		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 11 SPARC Security Technical Implementation Guide	2017-03-02

Details

Check Text ( C-50461r1_chk )
This check applies to the global zone only. Determine the zone that you are currently securing. # zonename If the command output is "global", this check applies. 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-51637r1_fix)
The root role is required. This action applies to the global zone only. Determine the zone that you are currently securing. # zonename If the command output is "global", this action applies. Modify the /etc/system file. # pfedit /etc/system add the line: set noexec_user_stack=1 Restart the system for the setting to take effect.