An improper restriction of excessive authentication attempts vulnerability [CWE-307] in FortiMail webmail version 7.2.0 through 7.2.4, 7.0.0 through 7.0.6 and before 6.4.8 may allow an unauthenticated attacker to perform a brute force attack on the affected endpoints via repeated login attempts.
Weakness
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Fortimail | Fortinet | 6.2.0 (including) | 6.2.9 (including) |
| Fortimail | Fortinet | 6.4.0 (including) | 6.4.8 (including) |
| Fortimail | Fortinet | 7.0.0 (including) | 7.0.6 (including) |
| Fortimail | Fortinet | 7.2.0 (including) | 7.2.4 (including) |
| Fortimail | Fortinet | 7.4.0 (including) | 7.4.0 (including) |
Potential Mitigations
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]
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/16.html
- https://cwe.mitre.org/data/definitions/49.html
- https://cwe.mitre.org/data/definitions/560.html
- https://cwe.mitre.org/data/definitions/565.html
- https://cwe.mitre.org/data/definitions/600.html
- https://cwe.mitre.org/data/definitions/652.html
- https://cwe.mitre.org/data/definitions/653.html