Summary
Vearch contains an authorization flaw in role resource checks that can disregard stored read-only or no-access privilege levels. An authenticated non-root user may modify or delete documents beyond their assigned permissions and potentially grant their role stronger privileges through the role management API.
Vearch contains an authorization flaw in role resource checks that can disregard stored read-only or no-access privilege levels. An authenticated non-root user may modify or delete documents beyond their assigned permissions and potentially grant their role stronger privileges through the role management API.
Affected context
The vulnerability affects Vearch deployments using the affected role-based access control logic. It becomes risky when an authenticated non-root account has access to resources listed in a role and the authorization check fails to honor the stored privilege level for those resources. The role management endpoint may further increase exposure when such users can update role definitions.
The vulnerability affects Vearch deployments using the affected role-based access control logic. It becomes risky when an authenticated non-root account has access to resources listed in a role and the authorization check fails to honor the stored privilege level for those resources. The role management endpoint may further increase exposure when such users can update role definitions.
Exploit preconditions
- Attack surface: Vearch document and role management APIs
- Required access: An authenticated non-root user with access to a role or its associated resources
- Trigger point: Resource operations or role updates evaluated by
Role.HasPermissionForResources - Why exploitation is possible: The authorization logic may ignore stored
ReadOnlyorNoneprivilege values, allowing operations or privilege changes beyond the user's intended authorization
- Attack surface: Vearch document and role management APIs
- Required access: An authenticated non-root user with access to a role or its associated resources
- Trigger point: Resource operations or role updates evaluated by
Role.HasPermissionForResources - Why exploitation is possible: The authorization logic may ignore stored
ReadOnlyorNoneprivilege values, allowing operations or privilege changes beyond the user's intended authorization
Why this happens
The underlying bug is an authorization decision that does not faithfully enforce the privilege state stored for each resource. When a role check treats listed resources as permitted without distinguishing read-only, no-access, and write-capable levels, an authenticated user can cross an intended authorization boundary. This behavior maps to CWE-863: Incorrect Authorization, because access-control logic fails to apply the configured permissions consistently.
The underlying bug is an authorization decision that does not faithfully enforce the privilege state stored for each resource. When a role check treats listed resources as permitted without distinguishing read-only, no-access, and write-capable levels, an authenticated user can cross an intended authorization boundary. This behavior maps to CWE-863: Incorrect Authorization, because access-control logic fails to apply the configured permissions consistently.
Potential impact
- Unauthorized document creation or modification may occur
- Unauthorized document deletion could occur
- A user may grant a role stronger write-read privileges
- Privilege escalation toward cluster administrator access may be possible
- Data integrity, availability, and confidentiality could be affected
- Unauthorized document creation or modification may occur
- Unauthorized document deletion could occur
- A user may grant a role stronger write-read privileges
- Privilege escalation toward cluster administrator access may be possible
- Data integrity, availability, and confidentiality could be affected
General mitigation guidance
Mitigation generally focuses on making authorization decisions explicit, consistent, and deny-by-default.
Common defensive patterns include:
- Enforcing
None, read-only, and read-write permissions distinctly for every resource - Centralizing authorization checks so all API operations use the same policy evaluation
- Requiring separate, strongly protected administrative privileges for role modification
- Reducing trust in client-supplied role or privilege values and deriving access from server-side policy
- Applying least privilege to service accounts and administrative identities
- Auditing role changes and rejecting requests that would exceed the caller's authority
Mitigation generally focuses on making authorization decisions explicit, consistent, and deny-by-default.
Common defensive patterns include:
- Enforcing
None, read-only, and read-write permissions distinctly for every resource - Centralizing authorization checks so all API operations use the same policy evaluation
- Requiring separate, strongly protected administrative privileges for role modification
- Reducing trust in client-supplied role or privilege values and deriving access from server-side policy
- Applying least privilege to service accounts and administrative identities
- Auditing role changes and rejecting requests that would exceed the caller's authority
How teams detect issues like this
Organizations can look for this class of issue through:
- Static analysis and code review of permission comparisons, enum handling, and default-allow branches
- Tests covering every resource privilege state, especially read-only and explicit no-access cases
- Authorization policy checks ensuring users cannot grant permissions they do not possess
- API monitoring for unexpected document writes, deletes, or role privilege changes by non-administrative accounts
- Automated security review tools that flag inconsistent or bypassable access-control logic
Organizations can look for this class of issue through:
- Static analysis and code review of permission comparisons, enum handling, and default-allow branches
- Tests covering every resource privilege state, especially read-only and explicit no-access cases
- Authorization policy checks ensuring users cannot grant permissions they do not possess
- API monitoring for unexpected document writes, deletes, or role privilege changes by non-administrative accounts
- Automated security review tools that flag inconsistent or bypassable access-control logic
