The ALG that is part of a CDS must block the transfer of data with malformed security attribute metadata structures.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-204971	SRG-NET-000280	SRG-NET-000280-ALG-000081	SV-204971r987741_rule	2024-12-04	2

Description
Enforcing allowed information flows based on metadata enables simpler and more effective flow control. Metadata is information used to describe the characteristics of data. Metadata can include structural metadata describing data structures (e.g., data format, syntax, and semantics) or descriptive metadata describing data contents (e.g., age, location, telephone number). For cross domain solutions, security attributes are defined as, at a minimum, source and destination address.

Description

Enforcing allowed information flows based on metadata enables simpler and more effective flow control. Metadata is information used to describe the characteristics of data. Metadata can include structural metadata describing data structures (e.g., data format, syntax, and semantics) or descriptive metadata describing data contents (e.g., age, location, telephone number). For cross domain solutions, security attributes are defined as, at a minimum, source and destination address.

ℹ️ Check
If the ALG is not part of a CDS, this is not applicable. Verify the ALG is configured to block the transfer of data with malformed security attribute metadata structures. If the ALG is not configured to block the transfer of data with malformed security attribute metadata structures, this is a finding.

✔️ Fix
If the ALG is part of a CDS, configure the ALG to block the transfer of data with malformed security attribute metadata structures.