vulnerability / NVI-00015263 / Revision 1
Lemur: Unchecked `replaces[]` lets any user silence notifications and hijack auto-rotation for arbitrary certificates
GitHub lists this reviewed advisory for lemur. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
8.1 high
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
lemur
source listed>= 0.5.0, <= 1.9.2
## Summary Repo under test: https://github.com/Netflix/lemur The certificate create and upload endpoints accept a `replaces[]` (alias `replacements`) array that is resolved to live `Certificate` ORM objects with no ownership or `CertificatePermission` check on the referenced certificates. The SQLAlchemy `Certificate.replaces` append listener then immediately sets `victim.notify = False` and populates `victim.replaced`. From that point the victim certificate is excluded from auto-reissue, its expiration notifications are silenced, and the periodic `certificate_rotate` Celery task deploys the attacker's certificate (`endpoint.certificate.replaced[0]`) onto every endpoint serving the victim certificate. Any authenticated non-read-only user can therefore silently substitute their own certificate onto production load balancers and Kubernetes secrets they hold no role on, while suppressing the legitimate certificate's lifecycle automation. ## Affected route `POST /api/1/certificates` `POST /api/1/certificates/upload` `PUT /api/1/certificates/` ## Affected code - `lemur/certificates/schemas.py:402`
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-cfh6-pv5c-38jv ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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