The Okta Access Gateway does not apply its Lua directive restriction to the application-level custom configuration field. The field is interpolated directly into the nginx server block without inspection, resulting in execution of injected directives.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v3.1