OCSP CertID serial-number length-confusion in wolfSSL_OCSP_resp_find_status allows a same-issuer SingleResponse whose serial is a prefix of the target serial to be reported as the revocation status of a different certificate. The lookup compared serial-number bytes without first requiring the two serial numbers to be of equal length, so a SingleResponse for one certificate (same issuer) whose serial is a prefix of the targets serial would match, returning the wrong certificates status. The fix requires the serial lengths to be equal before comparing the serial bytes.
Weakness
The product does not validate, or incorrectly validates, a certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Wolfssl | Wolfssl | 4.6.0 (including) | 5.9.2 (excluding) |
| Wolfssl | Ubuntu | questing | * |