The ALG that is part of a CDS, when transferring information between different security domains, must implement organization-defined security policy filters requiring fully enumerated formats that restrict data structure and content.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-54473	SRG-NET-000283-ALG-000072	SV-68719r1_rule		Medium

Description
Data structure and content restrictions reduce the range of potential malicious and/or unsanctioned content in cross-domain transactions. Security policy filters that restrict data structures include, for example, restricting file sizes and field lengths. Data content policy filters include: 1) Encoding formats for character sets (e.g., Universal Character Set Transformation Formats) 2) American Standard Code for Information Interchange (ASCII) 3) Restricting character data fields to only contain alpha-numeric characters 4) Prohibiting special characters 5) Validating schema structures Organization-defined security policy filters which require format restrictions depend on the environment, data, and security boundaries. Organizations implementing CDS must follow the DoD-required process of testing, baselining, and risk assessment to ensure the rigor and accuracy necessary to rely upon a CDS for cross domain security.

Description

Data structure and content restrictions reduce the range of potential malicious and/or unsanctioned content in cross-domain transactions. Security policy filters that restrict data structures include, for example, restricting file sizes and field lengths. Data content policy filters include: 1) Encoding formats for character sets (e.g., Universal Character Set Transformation Formats) 2) American Standard Code for Information Interchange (ASCII) 3) Restricting character data fields to only contain alpha-numeric characters 4) Prohibiting special characters 5) Validating schema structures Organization-defined security policy filters which require format restrictions depend on the environment, data, and security boundaries. Organizations implementing CDS must follow the DoD-required process of testing, baselining, and risk assessment to ensure the rigor and accuracy necessary to rely upon a CDS for cross domain security.

STIG	Date
Application Layer Gateway (ALG) Security Requirements Guide (SRG)	2015-06-30

Details

Check Text ( C-55089r1_chk )
If the ALG is not part of a CDS, this is not applicable. Verify the ALG, when transferring information between different security domains, implements organization-defined security policy filters requiring fully enumerated formats that restrict data structure and content. If the ALG when transferring information between different security domains does not implement organization-defined security policy filters requiring fully enumerated formats that restrict data structure and content, this is a finding.

Check Text ( C-55089r1_chk )

If the ALG is not part of a CDS, this is not applicable.

Verify the ALG, when transferring information between different security domains, implements organization-defined security policy filters requiring fully enumerated formats that restrict data structure and content.

If the ALG when transferring information between different security domains does not implement organization-defined security policy filters requiring fully enumerated formats that restrict data structure and content, this is a finding.

Fix Text (F-59327r1_fix)
If the ALG is part of a CDS, configure the ALG to implement organization-defined security policy filters requiring fully enumerated formats that restrict data structure and content when transferring information between different security domains.