An improper restriction of excessive authentication attempts vulnerability [CWE-307] in FortiTester Telnet port 2.3.0 through 3.9.1, 4.0.0 through 4.2.0, 7.0.0 through 7.1.0 may allow an unauthenticated attacker to guess the credentials of an admin user via a brute force attack.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Fortitester | Fortinet | 2.3.0 (including) | 3.9.2 (excluding) |
| Fortitester | Fortinet | 4.0.0 (including) | 4.2.1 (excluding) |
| Fortitester | Fortinet | 7.0.0 (including) | 7.1.1 (excluding) |
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]