Multiple cross-site request forgery (CSRF) vulnerabilities in the web interface in Cerberus FTP Server before 5.0.5.0 allow remote attackers to hijack the authentication of administrators for requests that (1) add a user account or (2) reconfigure the state of the FTP service, as demonstrated by a request to usermanager/users/modify.
Weakness
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ftp_server | Cerberusftp | * | 5.0.4.3 (including) |
| Ftp_server | Cerberusftp | 1.0 (including) | 1.0 (including) |
| Ftp_server | Cerberusftp | 1.01 (including) | 1.01 (including) |
| Ftp_server | Cerberusftp | 1.1 (including) | 1.1 (including) |
| Ftp_server | Cerberusftp | 1.2 (including) | 1.2 (including) |
| Ftp_server | Cerberusftp | 1.02 (including) | 1.02 (including) |
| Ftp_server | Cerberusftp | 1.03 (including) | 1.03 (including) |
| Ftp_server | Cerberusftp | 1.5 (including) | 1.5 (including) |
| Ftp_server | Cerberusftp | 1.05 (including) | 1.05 (including) |
| Ftp_server | Cerberusftp | 1.6-beta (including) | 1.6-beta (including) |
| Ftp_server | Cerberusftp | 1.7 (including) | 1.7 (including) |
| Ftp_server | Cerberusftp | 1.22 (including) | 1.22 (including) |
| Ftp_server | Cerberusftp | 1.71 (including) | 1.71 (including) |
| Ftp_server | Cerberusftp | 2.0 (including) | 2.0 (including) |
| Ftp_server | Cerberusftp | 2.0-beta1 (including) | 2.0-beta1 (including) |
| Ftp_server | Cerberusftp | 2.0-beta2 (including) | 2.0-beta2 (including) |
| Ftp_server | Cerberusftp | 2.0-beta3 (including) | 2.0-beta3 (including) |
| Ftp_server | Cerberusftp | 2.0-beta4 (including) | 2.0-beta4 (including) |
| Ftp_server | Cerberusftp | 2.1 (including) | 2.1 (including) |
| Ftp_server | Cerberusftp | 2.01 (including) | 2.01 (including) |
| Ftp_server | Cerberusftp | 2.02 (including) | 2.02 (including) |
| Ftp_server | Cerberusftp | 2.2 (including) | 2.2 (including) |
| Ftp_server | Cerberusftp | 2.02-beta (including) | 2.02-beta (including) |
| Ftp_server | Cerberusftp | 2.2-beta1 (including) | 2.2-beta1 (including) |
| Ftp_server | Cerberusftp | 2.2-beta2 (including) | 2.2-beta2 (including) |
| Ftp_server | Cerberusftp | 2.2-beta3 (including) | 2.2-beta3 (including) |
| Ftp_server | Cerberusftp | 2.3 (including) | 2.3 (including) |
| Ftp_server | Cerberusftp | 2.4 (including) | 2.4 (including) |
| Ftp_server | Cerberusftp | 2.4-beta1 (including) | 2.4-beta1 (including) |
| Ftp_server | Cerberusftp | 2.4-beta2 (including) | 2.4-beta2 (including) |
| Ftp_server | Cerberusftp | 2.4-beta3 (including) | 2.4-beta3 (including) |
| Ftp_server | Cerberusftp | 2.11 (including) | 2.11 (including) |
| Ftp_server | Cerberusftp | 2.11-beta (including) | 2.11-beta (including) |
| Ftp_server | Cerberusftp | 2.11-beta2 (including) | 2.11-beta2 (including) |
| Ftp_server | Cerberusftp | 2.15 (including) | 2.15 (including) |
| Ftp_server | Cerberusftp | 2.15-beta (including) | 2.15-beta (including) |
| Ftp_server | Cerberusftp | 2.16 (including) | 2.16 (including) |
| Ftp_server | Cerberusftp | 2.21 (including) | 2.21 (including) |
| Ftp_server | Cerberusftp | 2.22 (including) | 2.22 (including) |
| Ftp_server | Cerberusftp | 2.23-beta (including) | 2.23-beta (including) |
| Ftp_server | Cerberusftp | 2.31 (including) | 2.31 (including) |
| Ftp_server | Cerberusftp | 2.32 (including) | 2.32 (including) |
| Ftp_server | Cerberusftp | 2.41 (including) | 2.41 (including) |
| Ftp_server | Cerberusftp | 2.42 (including) | 2.42 (including) |
| Ftp_server | Cerberusftp | 2.43 (including) | 2.43 (including) |
| Ftp_server | Cerberusftp | 2.44 (including) | 2.44 (including) |
| Ftp_server | Cerberusftp | 2.45 (including) | 2.45 (including) |
| Ftp_server | Cerberusftp | 2.46 (including) | 2.46 (including) |
| Ftp_server | Cerberusftp | 2.47 (including) | 2.47 (including) |
| Ftp_server | Cerberusftp | 2.48 (including) | 2.48 (including) |
| Ftp_server | Cerberusftp | 2.49 (including) | 2.49 (including) |
| Ftp_server | Cerberusftp | 2.50 (including) | 2.50 (including) |
| Ftp_server | Cerberusftp | 3.0 (including) | 3.0 (including) |
| Ftp_server | Cerberusftp | 3.0.1 (including) | 3.0.1 (including) |
| Ftp_server | Cerberusftp | 3.0.2 (including) | 3.0.2 (including) |
| Ftp_server | Cerberusftp | 3.0.3 (including) | 3.0.3 (including) |
| Ftp_server | Cerberusftp | 3.0.4 (including) | 3.0.4 (including) |
| Ftp_server | Cerberusftp | 3.0.5 (including) | 3.0.5 (including) |
| Ftp_server | Cerberusftp | 3.0.6 (including) | 3.0.6 (including) |
| Ftp_server | Cerberusftp | 3.0.7 (including) | 3.0.7 (including) |
| Ftp_server | Cerberusftp | 3.0.7.1 (including) | 3.0.7.1 (including) |
| Ftp_server | Cerberusftp | 3.0.8 (including) | 3.0.8 (including) |
| Ftp_server | Cerberusftp | 3.1 (including) | 3.1 (including) |
| Ftp_server | Cerberusftp | 3.1.0.3 (including) | 3.1.0.3 (including) |
| Ftp_server | Cerberusftp | 3.1.0.4 (including) | 3.1.0.4 (including) |
| Ftp_server | Cerberusftp | 3.1.0.5 (including) | 3.1.0.5 (including) |
| Ftp_server | Cerberusftp | 3.1.1 (including) | 3.1.1 (including) |
| Ftp_server | Cerberusftp | 3.1.2 (including) | 3.1.2 (including) |
| Ftp_server | Cerberusftp | 3.1.3 (including) | 3.1.3 (including) |
| Ftp_server | Cerberusftp | 3.1.3.1 (including) | 3.1.3.1 (including) |
| Ftp_server | Cerberusftp | 3.1.4 (including) | 3.1.4 (including) |
| Ftp_server | Cerberusftp | 4.0.0 (including) | 4.0.0 (including) |
| Ftp_server | Cerberusftp | 4.0.0.6 (including) | 4.0.0.6 (including) |
| Ftp_server | Cerberusftp | 4.0.0.8 (including) | 4.0.0.8 (including) |
| Ftp_server | Cerberusftp | 4.0.0.9 (including) | 4.0.0.9 (including) |
| Ftp_server | Cerberusftp | 4.0.0.11 (including) | 4.0.0.11 (including) |
| Ftp_server | Cerberusftp | 4.0.1 (including) | 4.0.1 (including) |
| Ftp_server | Cerberusftp | 4.0.1.1 (including) | 4.0.1.1 (including) |
| Ftp_server | Cerberusftp | 4.0.2 (including) | 4.0.2 (including) |
| Ftp_server | Cerberusftp | 4.0.2.2 (including) | 4.0.2.2 (including) |
| Ftp_server | Cerberusftp | 5.0.0.0 (including) | 5.0.0.0 (including) |
| Ftp_server | Cerberusftp | 5.0.0.1 (including) | 5.0.0.1 (including) |
| Ftp_server | Cerberusftp | 5.0.0.2 (including) | 5.0.0.2 (including) |
| Ftp_server | Cerberusftp | 5.0.0.3 (including) | 5.0.0.3 (including) |
| Ftp_server | Cerberusftp | 5.0.0.4 (including) | 5.0.0.4 (including) |
| Ftp_server | Cerberusftp | 5.0.0.5 (including) | 5.0.0.5 (including) |
| Ftp_server | Cerberusftp | 5.0.0.6 (including) | 5.0.0.6 (including) |
| Ftp_server | Cerberusftp | 5.0.0.7 (including) | 5.0.0.7 (including) |
| Ftp_server | Cerberusftp | 5.0.1.0 (including) | 5.0.1.0 (including) |
| Ftp_server | Cerberusftp | 5.0.1.1 (including) | 5.0.1.1 (including) |
| Ftp_server | Cerberusftp | 5.0.1.2 (including) | 5.0.1.2 (including) |
| Ftp_server | Cerberusftp | 5.0.2.0 (including) | 5.0.2.0 (including) |
| Ftp_server | Cerberusftp | 5.0.3.0 (including) | 5.0.3.0 (including) |
| Ftp_server | Cerberusftp | 5.0.3.1 (including) | 5.0.3.1 (including) |
| Ftp_server | Cerberusftp | 5.0.4.0 (including) | 5.0.4.0 (including) |
| Ftp_server | Cerberusftp | 5.0.4.1 (including) | 5.0.4.1 (including) |
| Ftp_server | Cerberusftp | 5.0.4.2 (including) | 5.0.4.2 (including) |
Potential Mitigations
- 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].
- For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
- Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
- Use the “double-submitted cookie” method as described by Felten and Zeller:
- When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
- Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
- This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/111.html
- https://cwe.mitre.org/data/definitions/462.html
- https://cwe.mitre.org/data/definitions/467.html
- https://cwe.mitre.org/data/definitions/62.html