The ALG must reveal error messages only to the IAO, IAM, and SA.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000402-ALG-000130	SRG-NET-000402-ALG-000130	SRG-NET-000402-ALG-000130_rule		Medium

Description
Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can give configuration details about the network element. Additionally, Personally Identifiable Information (PII) and operational information must not be revealed through error messages to unauthorized personnel. The structure and content of error messages need to be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements. This requirement applies to gateways and firewalls that perform content inspection or have higher-layer proxy functionality.

Description

Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can give configuration details about the network element. Additionally, Personally Identifiable Information (PII) and operational information must not be revealed through error messages to unauthorized personnel. The structure and content of error messages need to be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements. This requirement applies to gateways and firewalls that perform content inspection or have higher-layer proxy functionality.

STIG	Date
Application Layer Gateway Security Requirements Guide	2014-06-27

Details

Check Text ( C-SRG-NET-000402-ALG-000130_chk )
Verify the ALG reveals error messages only to the IAO, IAM, and SA. If the ALG does not reveal error messages only to the IAO, IAM, and SA, this is a finding.

Fix Text (F-SRG-NET-000402-ALG-000130_fix)
Configure the ALG to reveal error messages only to the IAO, IAM, and SA.