QID 580535

QID 580535: Integer and Numeric Field Exact Minimum Not Accepted

In this scenario exact minimum value for integer and numeric type fields, whose minimum limit is defined, are tested. For all integer and numeric type fields whose minimum is not defined, this test is skipped.

Detection Logic:
Integer and numeric type fields, are replaced with exact minimum value defined in the swagger file and sent to the server for the endpoint being tested. The expectation is that APIs will accept the request as value and treat it as happy path. The purpose of the test is to verify that all defined boundaries are properly implemented. Based on testing done replacing integer and numeric values with the exact minimum defined in swagger file it is determined that the response code to some valid values does not match schema definition for field being tested.

Enforcing the minimum value set on the field will help provide clarity to the API users and avoid abuse of the API by hackers. Enforcing limits help in mitigating resource exhaustion attacks. API users might be confused with the response mismatch to valid values.

CVSS V3 rated as High - 6.5 severity.

CVSS V2 rated as Low - 0 severity.

Solution

Please ensure that the server accepts requests with valid values and rejects invalid requests with documented error code and schemas. Add input validations and ensure the server implementation is aligned with swagger file.

Vendor References

CVEs related to QID 580535

Software Advisories

Advisory ID	Software	Component	Link

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