The IDPS must maintain the integrity of information during aggregation and encapsulation in preparation for transmission.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000209-IDPS-000212	SRG-NET-000209-IDPS-000212	SRG-NET-000209-IDPS-000212_rule		Medium

Description
This control applies to communications across internal and external networks. The IDPS must employ cryptographic mechanisms to recognize changes to information while preparing information for transmission unless the transmission is otherwise protected by alternative physical measures. If connectivity is provided by a commercial service provider rather than a dedicated service, obtaining the necessary assurances regarding the implementation of needed security controls for transmission integrity may not be possible. Without cryptographic integrity controls, information traveling over commercial networks could be altered or compromised during transmission. Therefore, these controls must be obtained from the service provider using appropriate contracting vehicles. If this is not feasible, then the organization will implement physical or logical compensating security controls. The IDPS does not provide transmission service integrity protections over commercial lines.

Description

This control applies to communications across internal and external networks. The IDPS must employ cryptographic mechanisms to recognize changes to information while preparing information for transmission unless the transmission is otherwise protected by alternative physical measures. If connectivity is provided by a commercial service provider rather than a dedicated service, obtaining the necessary assurances regarding the implementation of needed security controls for transmission integrity may not be possible. Without cryptographic integrity controls, information traveling over commercial networks could be altered or compromised during transmission. Therefore, these controls must be obtained from the service provider using appropriate contracting vehicles. If this is not feasible, then the organization will implement physical or logical compensating security controls. The IDPS does not provide transmission service integrity protections over commercial lines.

STIG	Date
IDPS Security Requirements Guide (SRG)	2012-03-08

Details

Check Text ( C-43374_chk )
This control does not apply if the information is protected by a physical security solution (e.g., PDS or physical access control) while in transit. Inspect the encryption configuration for each configured interface capable of communication with the network. Verify the encryption module is configured to use an approved hashing algorithm to protect information during aggregation and encapsulation in preparation for transmission. If the IDPS and sensors do not use cryptographic mechanisms to protect the integrity of information during aggregation and encapsulation in preparation for transmission, this is a finding.

Check Text ( C-43374_chk )

This control does not apply if the information is protected by a physical security solution (e.g., PDS or physical access control) while in transit.

Inspect the encryption configuration for each configured interface capable of communication with the network.
Verify the encryption module is configured to use an approved hashing algorithm to protect information during aggregation and encapsulation in preparation for transmission.

If the IDPS and sensors do not use cryptographic mechanisms to protect the integrity of information during aggregation and encapsulation in preparation for transmission, this is a finding.

Fix Text (F-43374_fix)
Configure the cryptographic module on all interfaces capable of communications to use cryptographic mechanisms configured with an approved hashing algorithm to protect the integrity of information during aggregation and encapsulation in preparation for transmission.