1,400 Long-Lived Cloud Keys Across a 300-Repository CI Estate
A financial-services firm runs 300 source repositories and 42 production deployment pipelines on a shared CI service. An audit found 1,400 long-lived cloud access keys stored as CI variables; 220 are attached to roles that can modify IAM or delete storage, and the median key age is 640 days. Last week a researcher reported one of these keys in a public repository; it had been valid for 19 months and had been used from two unfamiliar IP ranges in the preceding six weeks. Forty pipelines still run on an on-premises Jenkins controller that cannot issue OIDC tokens, and its replacement is scheduled nine months out. Auditors have accepted a 12-month remediation window but require evidence of progress at 90 days. There is no central inventory mapping keys to owning teams, and two teams have already said rotation will break their deployments.
1. Sequence the first 30 days of remediation. What do you do first, what do you do next, and what do you deliberately defer?
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Order the work by blast radius and reversibility, not by tidiness.
Days 1 to 3: contain the known exposure. Revoke the leaked key and any sibling keys created by the same person or pipeline. Pull the audit history for that key's identity to see what the two unfamiliar IP ranges did. Rotate every key on the 220 privileged roles, because those rotations are the ones that could end the company. Assume credential theft is under way until the access history says otherwise.
Days 4 to 14: build the inventory the firm lacks. Extract last-used dates, owning pipeline, attached role, and effective permissions for all 1,400 keys. Rank into tiers: privileged and never-rotated first, read-only to a single bucket last. Publish the inventory with named owners and a per-key deadline; unowned keys get disabled on a published date.
Days 15 to 30: convert the highest-tier pipelines to short-lived credentials using workload identity federation, starting with pipelines already on a CI platform that can issue OIDC tokens. Simultaneously cut each role to the permissions the pipeline actually exercises, so that a future key compromise is not an admin compromise.
Defer: rotating the long tail of low-privilege keys, and any migration that depends on the Jenkins replacement. Deferring those is defensible; deferring the 220 privileged keys is not. Report the tier counts and completion percentage at 90 days.
2. Forty production pipelines run on a legacy Jenkins controller that cannot issue OIDC tokens. Compare the realistic options for removing their long-lived credentials and recommend one.
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Four options are realistically available.
- Keep static keys but reduce and rotate them. Cheapest, fastest, and leaves the original risk in place. Acceptable only as a dated bridge for the handful of pipelines that cannot be moved.
- Put a secrets broker in front of Jenkins. Jenkins holds one credential to the broker; the broker authenticates Jenkins by its own identity, then calls the cloud STS to mint short-lived credentials scoped to the specific pipeline. The broker becomes a high-value target, so it needs strong authentication, narrow per-pipeline policy, and full audit of every issuance.
- Run a self-hosted OIDC issuer or identity proxy on the Jenkins network and federate from it. This recovers the OIDC model without upgrading Jenkins, but you now own the availability and key management of that issuer.
- Move the 40 pipelines onto a build environment that can issue OIDC tokens ahead of the Jenkins retirement, even if the controller itself stays.
Recommendation: option 2 for the bulk of the 40, with option 4 for the ten or so pipelines that deploy to the most sensitive accounts and can be moved early. Option 3 is attractive only if the firm already runs identity infrastructure it trusts. Whatever is chosen, cap the issued credential lifetime at the pipeline's measured runtime plus a small margin, bind the policy to the specific repository and environment, and alert on issuance from an unexpected source.
3. How do you prove remediation to the auditors and detect keys that are still in use after the team believes they are retired?
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Auditors accept evidence of mechanism, not assurances of intent. Build three artifacts.
First, a control narrative that maps each requirement to a technical control: no long-lived credentials in CI, credentials issued per pipeline, maximum lifetime, permission scoping. Name the enforcing system, not the team.
Second, a continuous evidence feed. Generate a daily report from credential metadata showing every key with its owner, age, last-used timestamp, and attached permissions, and publish trend lines of key count and median age. Auditors respond to a declining curve with named exceptions far better than to a one-off attestation. Maintain an explicit exception register: key ID, reason, compensating control, expiry date, approver.
Third, detection of residual use. Disabling a key without deleting it is the useful intermediate state: the key still exists for audit, but any use now fails, and the failure generates an alert with the caller's source identity. Keep keys disabled for 30 days before deletion and treat every hit as either a missed dependency or an unauthorized holder. Correlate with API audit logs for the owning role, alert on any credential use from an IP range outside the pipeline egress range, and alert on new key creation by any identity that should no longer be creating keys.
Finally, run an independent sample: pick 30 keys at random, confirm revocation, and try to authenticate with them in a controlled test. Sampling catches the cases where automation reported success but the credential survived.