Summary
Cube-studio contains an insecure direct object reference vulnerability in lifecycle endpoints for notebooks and services. An authenticated user may manipulate another user's resources by supplying their identifiers, which could stop, reset, clear, or redeploy workloads and take inference services offline.
Cube-studio contains an insecure direct object reference vulnerability in lifecycle endpoints for notebooks and services. An authenticated user may manipulate another user's resources by supplying their identifiers, which could stop, reset, clear, or redeploy workloads and take inference services offline.
Affected context
The issue occurs in Cube-studio deployments where authenticated users can reach notebook and inference-service lifecycle endpoints without a server-side authorization check binding the requested identifier to the requesting user's permitted resources. Sequential or otherwise discoverable identifiers can increase the exposure of these endpoints.
The issue occurs in Cube-studio deployments where authenticated users can reach notebook and inference-service lifecycle endpoints without a server-side authorization check binding the requested identifier to the requesting user's permitted resources. Sequential or otherwise discoverable identifiers can increase the exposure of these endpoints.
Exploit preconditions
- Attack surface: Notebook and service lifecycle HTTP endpoints - Required access: A valid authenticated Cube-studio account - Trigger point: Requests to stop, reset, clear, or redeploy resources by ID - Why exploitation is possible: The server may accept a supplied resource
identifier without verifying ownership or explicit authorization
- Attack surface: Notebook and service lifecycle HTTP endpoints - Required access: A valid authenticated Cube-studio account - Trigger point: Requests to stop, reset, clear, or redeploy resources by ID - Why exploitation is possible: The server may accept a supplied resource
identifier without verifying ownership or explicit authorization
Why this happens
The underlying bug is an object-level authorization failure. Lifecycle handlers trust a client-supplied notebook or service ID to select a target, but do not consistently confirm that the authenticated principal is allowed to operate on that object. This behavior maps to CWE-639 because direct references to resources are exposed without an effective authorization decision for each request.
The underlying bug is an object-level authorization failure. Lifecycle handlers trust a client-supplied notebook or service ID to select a target, but do not consistently confirm that the authenticated principal is allowed to operate on that object. This behavior maps to CWE-639 because direct references to resources are exposed without an effective authorization decision for each request.
Potential impact
- An attacker may stop or reset another user's notebook
- An attacker could clear or redeploy unauthorized services
- Production inference endpoints may be taken offline
- Running pods and workloads may be deleted or disrupted
- Availability of shared data-science infrastructure may be reduced
- An attacker may stop or reset another user's notebook
- An attacker could clear or redeploy unauthorized services
- Production inference endpoints may be taken offline
- Running pods and workloads may be deleted or disrupted
- Availability of shared data-science infrastructure may be reduced
General mitigation guidance
Mitigation generally focuses on enforcing object-level authorization at every lifecycle operation. Resource identifiers should be treated as untrusted, and each request should resolve the target through an authorization-aware query or policy check tied to the authenticated identity and tenant. Prefer non-sequential or opaque identifiers as a defense in depth measure, while not treating identifier obscurity as authorization. Apply least privilege to service accounts, separate production resources from user-owned environments, and use secure-by-default policies that deny unapproved lifecycle actions.
Mitigation generally focuses on enforcing object-level authorization at every lifecycle operation. Resource identifiers should be treated as untrusted, and each request should resolve the target through an authorization-aware query or policy check tied to the authenticated identity and tenant. Prefer non-sequential or opaque identifiers as a defense in depth measure, while not treating identifier obscurity as authorization. Apply least privilege to service accounts, separate production resources from user-owned environments, and use secure-by-default policies that deny unapproved lifecycle actions.
How teams detect issues like this
Detection may include static analysis and code review checks for handlers that use request-provided IDs in update, delete, reset, or redeploy operations without an adjacent authorization decision. Review signals include direct database lookups followed immediately by lifecycle actions, missing ownership filters, and authorization performed only at the UI layer. Runtime monitoring can flag users operating on resources outside their normal scope, repeated identifier enumeration, and unusual bursts of destructive lifecycle requests. Automated security testing and policy checks can help enforce object-level authorization requirements.
Detection may include static analysis and code review checks for handlers that use request-provided IDs in update, delete, reset, or redeploy operations without an adjacent authorization decision. Review signals include direct database lookups followed immediately by lifecycle actions, missing ownership filters, and authorization performed only at the UI layer. Runtime monitoring can flag users operating on resources outside their normal scope, repeated identifier enumeration, and unusual bursts of destructive lifecycle requests. Automated security testing and policy checks can help enforce object-level authorization requirements.
