The ALG must fail securely in the event of an operational failure.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-205009 | SRG-NET-000365-ALG-000123 | SV-205009r1138084_rule | CCI-001126 | medium |
| Description | ||||
| If a boundary protection device fails in an unsecure manner (open), information external to the boundary protection device may enter, or the device may permit unauthorized information release. Secure failure ensures when a boundary control device fails, all traffic will be subsequently denied. Fail secure is a condition achieved by employing information system mechanisms to ensure in the event of operational failures of boundary protection devices at managed interfaces (e.g., routers, firewalls, guards, and application gateways residing on protected subnetworks commonly referred to as demilitarized zones), information systems do not enter into unsecure states where intended security properties no longer hold. This requirement also applies to Zero Trust initiatives. | ||||
| STIG | Date | |||
| Application Layer Gateway Security Requirements Guide | 2025-09-15 | |||
Related Frameworks
1 mapping across 4 frameworks
Related Frameworks
SCF0 mappings
No source states a mapping between these directly.
Also reachable in 3 hops (1) derived by us, not asserted by any source
Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.
- DISA STIG Benchmark (XCCDF)V2R3intersects(normalised)
- DISA CCI List2025-01-23equal to(normalised)
- SCF Secure Traceability Relationship Mapping (STRM)2026.2intersects
NIST 800-530 mappings
No source states a mapping between these directly.
Also reachable in 2 hops (1) derived by us, not asserted by any source
Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.
- DISA STIG Benchmark (XCCDF)V2R3intersects(normalised)
- DISA CCI List2025-01-23equal to(normalised)
CCI1 mapping
CCI-001126
1.00
- DISA STIG Benchmark (XCCDF)V2R3intersects(normalised)
NIST CSF 2.00 mappings
No source states a mapping between these directly.
Also reachable in 4 hops (3) derived by us, not asserted by any source
Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.
- DISA STIG Benchmark (XCCDF)V2R3intersects(normalised)
- DISA CCI List2025-01-23equal to(normalised)
- SCF Secure Traceability Relationship Mapping (STRM)2026.2intersects
- NIST OLIR Informative ReferenceOLIR 153 (2025-04-07)intersects(normalised)SCF Focal Document mapping (catalog)SCF 2026.2 focalintersects(normalised)
PR.IR-01
0.50
- DISA STIG Benchmark (XCCDF)V2R3intersects(normalised)
- DISA CCI List2025-01-23equal to(normalised)
- SCF Secure Traceability Relationship Mapping (STRM)2026.2intersects
- NIST OLIR Informative ReferenceOLIR 153 (2025-04-07)intersects(normalised)SCF Focal Document mapping (catalog)SCF 2026.2 focalintersects(normalised)
PR.IR-03
0.50
- DISA STIG Benchmark (XCCDF)V2R3intersects(normalised)
- DISA CCI List2025-01-23equal to(normalised)
- SCF Secure Traceability Relationship Mapping (STRM)2026.2intersects
- NIST OLIR Informative ReferenceOLIR 153 (2025-04-07)intersects(normalised)SCF Focal Document mapping (catalog)SCF 2026.2 focalintersects(normalised)
Details
Check Text (C-205009r1138084_chk)
Verify the ALG fails securely in the event of an operational failure.
If the ALG does not fail securely in the event of an operational failure, this is a finding.
Fix Text (F-5277r396401_fix)
Configure the ALG to fail securely in the event of an operational failure.