CONDUIT TICKET REPORT

Finding Summary

Short description

[TITAN] High — network on fw-telco-oss-bss

Severity

High

Priority

2 - High

Resource

fw-telco-oss-bss

Resource type

compute.googleapis.com/Firewall

Cloud

Multi

Subscription / Account

adroit-terminus-234522

Resource group / Project

telco-prd-project

The Security Finding

OSS/BSS firewall rule permits east-west traffic between customer-care VMs and SIP-trunking VMs on any port. Network segmentation requirement per CIS GCP 4.1 and GSMA PRD IR.34.

ITIL Change Management Fields

Justification

High: OSS/BSS firewall rule permits east-west traffic between customer-care VMs and SIP-trunking VMs on any port. Network segmentation requirement per CIS GCP 4.1 and GSMA PRD IR.34.

Implementation Plan

1. Pre-change snapshot captured by TITAN (auto-rollback available).
2. Execute fix command:
   gcloud compute firewall-rules delete fw-telco-oss-bss && gcloud compute firewall-rules create fw-telco-oss-bss-hardened --source-ranges=10.50.0.0/24 --target-tags=sip-trunk --allow=tcp:5060-5061,udp:5060,udp:10000-20000
3. TITAN FORGE verifies the fix was applied.
4. Post-change rescan by TITAN SCOUT — finding must no longer appear.
5. Close ticket with Successful close_code.

Risk & Impact Analysis

Risk level: MEDIUM-HIGH risk — misconfiguration with realistic exploit path.
Business impact if unremediated: Increases attack surface; auditor finding likely.
Scope: single resource (fw-telco-oss-bss).
Blast radius: change is idempotent; pre-change snapshot captured by TITAN; auto-rollback available if rescan fails.
Finding detail: OSS/BSS firewall rule permits east-west traffic between customer-care VMs and SIP-trunking VMs on any port. Network segmentation requirement per CIS GCP 4.1 and GSMA PRD IR.34.

Backout / Rollback Plan

1. TITAN auto-captured snapshot of fw-telco-oss-bss before change (baseline: titan-telecom-demo-20260422T201925Z).
2. If post-change rescan still shows the finding OR a new issue appears within 15 min:
   a. TITAN FORGE fires rollback automatically using stored snapshot.
   b. Incident reopens and escalates to on-call.
3. Manual rollback command path (human override) is documented in close notes.

Test Plan

1. TITAN SCOUT rescans fw-telco-oss-bss immediately after FORGE applies the change.
2. PASS criteria: the specific finding no longer appears in SCOUT results.
3. PASS criteria: no new CRITICAL or HIGH findings introduced by the change.
4. Automated compliance check: HIPAA/PCI/SOC2 controls re-evaluated.
5. If any check fails, backout plan fires automatically.

Recommended Fix

gcloud compute firewall-rules delete fw-telco-oss-bss && gcloud compute firewall-rules create fw-telco-oss-bss-hardened --source-ranges=10.50.0.0/24 --target-tags=sip-trunk --allow=tcp:5060-5061,udp:5060,udp:10000-20000

Compliance Mapping

Routing Metadata

Assignment group

network_operations

Change type

Normal

Approval required

Yes

Planned start

2026-04-22 19:27:25

Planned end

2026-04-22 21:27:25

Scan ID

titan-telecom-demo-20260422T201925Z

Generated at

2026-04-22T19:13:25+00:00

Opened

2026-04-22 19:13:25

Closed

2026-04-22 19:13:25

Close code

—

Attached Security Ticket

OSS/BSS firewall rule permits east-west traffic between customer-care VMs and SIP-trunking VMs on any port. Network segmentation requirement per CIS GCP 4.1 and GSMA PRD IR.34.

Recommended Fix: gcloud compute firewall-rules delete fw-telco-oss-bss && gcloud compute firewall-rules create fw-telco-oss-bss-hardened --source-ranges=10.50.0.0/24 --target-tags=sip-trunk --allow=tcp:5060-5061,udp:5060,udp:10000-20000

AI Close Notes

TITAN CONDUIT opened this high network ticket and assigned it to the regulatory_affairs group for review. STATE: ASSIGNED — awaiting human action. Per TITAN AI policy, configuration changes are NEVER auto-applied and tickets are NEVER auto-closed by TITAN. The assigned group reviews the recommended fix, schedules an approved maintenance window, applies the fix manually, validates via SCOUT rescan, and closes this ticket themselves. TITAN documents and routes — the human owns the change from here.