Improper restriction of excessive authentication attempts with two factor authentication methods in Checkmk 2.3 before 2.3.0p6 facilitates brute-forcing of second factor mechanisms.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Checkmk | Checkmk | 2.3.0-p1 (including) | 2.3.0-p1 (including) |
| Checkmk | Checkmk | 2.3.0-p2 (including) | 2.3.0-p2 (including) |
| Checkmk | Checkmk | 2.3.0-p3 (including) | 2.3.0-p3 (including) |
| Checkmk | Checkmk | 2.3.0-p4 (including) | 2.3.0-p4 (including) |
| Checkmk | Checkmk | 2.3.0-p5 (including) | 2.3.0-p5 (including) |
Common protection mechanisms include:
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]