STIGQter: STIG Summary: Application Layer Gateway Security Requirements Guide Version: 2 Release: 4 Benchmark Date: 01 Jul 2026:

The ALG that provides intermediary services for TLS must validate certificates used for TLS functions by performing RFC 5280-compliant certification path validation.

DISA Rule

SV-204950r395985_rule

Vulnerability Number

V-204950

Group Title

SRG-NET-000164

Rule Version

SRG-NET-000164-ALG-000100

Severity

CAT II

CCI(s)

• CCI-000185 - For public key-based authentication, validate certificates by constructing and verifying a certification path to an accepted trust anchor including checking certificate status information.

Weight

10

Fix Recommendation

If intermediary services for TLS are provided, configure the ALG to validate certificates used for TLS functions by performing RFC 5280-compliant certification path validation.

Check Contents

If the ALG does not provide intermediary services for TLS, or application protocols that use TLS (e.g., DNSSEC or HTTPS), this is not applicable.

Verify the ALG validates certificates used for TLS functions by performing RFC 5280-compliant certification path validation.

If the ALG does not validate certificates used for TLS functions by performing RFC 5280-compliant certification path validation, this is a finding.

Vulnerability Number

V-204950

Documentable

False

Rule Version

SRG-NET-000164-ALG-000100

Severity Override Guidance

If the ALG does not provide intermediary services for TLS, or application protocols that use TLS (e.g., DNSSEC or HTTPS), this is not applicable.

Verify the ALG validates certificates used for TLS functions by performing RFC 5280-compliant certification path validation.

If the ALG does not validate certificates used for TLS functions by performing RFC 5280-compliant certification path validation, this is a finding.

Check Content Reference

M

Target Key

2904