CONDUIT TICKET REPORT

Finding Summary

Short description

[TITAN] Medium — legacy_eol on acr-retired-image-base

Severity

Medium

Priority

3 - Moderate

Resource

acr-retired-image-base

Resource type

Microsoft.ContainerRegistry/registries/images

Cloud

Azure

Subscription / Account

4f29d094-1079-44c9-acb0-4d73a7a2dd34

Resource group / Project

rg-legacy-prod

The Security Finding

Container base image 'centos:7' detected in ACR — CentOS 7 EOL 2024-06-30 (297 days). Used as base for 14 downstream application images currently deployed. Fails CIS Controls v8 7.3, NIST 800-53 CM-6.

ITIL Change Management Fields

Justification

Medium: Container base image 'centos:7' detected in ACR — CentOS 7 EOL 2024-06-30 (297 days). Used as base for 14 downstream application images currently deployed. Fails CIS Controls v8 7.3, NIST 800-53 CM-6.

Implementation Plan

1. Pre-change snapshot captured by TITAN (auto-rollback available).
2. Execute fix command:
   Rebuild images from rockylinux:9 or almalinux:9. Update all 14 downstream Dockerfile FROM statements. Rolling deploy via existing CI/CD.
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 risk — weaker control, should be hardened.
Business impact if unremediated: Control weakness that compounds with other gaps.
Scope: single resource (acr-retired-image-base).
Blast radius: change is idempotent; pre-change snapshot captured by TITAN; auto-rollback available if rescan fails.
Finding detail: Container base image 'centos:7' detected in ACR — CentOS 7 EOL 2024-06-30 (297 days). Used as base for 14 downstream application images currently deployed. Fails CIS Controls v8 7.3, NIST 800-53 CM-6.

Backout / Rollback Plan

1. TITAN auto-captured snapshot of acr-retired-image-base before change (baseline: titan-legacy-demo-20260422T201927Z).
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 acr-retired-image-base 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

Rebuild images from rockylinux:9 or almalinux:9. Update all 14 downstream Dockerfile FROM statements. Rolling deploy via existing CI/CD.

Compliance Mapping

Routing Metadata

Assignment group

security_engineering

Change type

Normal

Approval required

No

Planned start

2026-04-22 20:09:27

Planned end

2026-04-22 22:09:27

Scan ID

titan-legacy-demo-20260422T201927Z

Generated at

2026-04-22T19:55:27+00:00

Opened

2026-04-22 19:55:27

Closed

2026-04-22 19:55:27

Close code

—

Attached Security Ticket

Container base image 'centos:7' detected in ACR — CentOS 7 EOL 2024-06-30 (297 days). Used as base for 14 downstream application images currently deployed. Fails CIS Controls v8 7.3, NIST 800-53 CM-6.

Recommended Fix: Rebuild images from rockylinux:9 or almalinux:9. Update all 14 downstream Dockerfile FROM statements. Rolling deploy via existing CI/CD.

AI Close Notes

TITAN CONDUIT opened this medium legacy_eol ticket and assigned it to the security_engineering 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.