Accellion FTP server prior to version FTA_9_12_220 only returns the username in the server response if the username is invalid. An attacker may use this information to determine valid user accounts and enumerate them.
Solution:
The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
| Link | Tags |
|---|---|
| https://www.qualys.com/2016/12/06/qsa-2016-12-06/qsa-2016-12-06.pdf | third party advisory exploit |
| https://www.securityfocus.com/bid/96154 | vdb entry third party advisory |
| https://www.kb.cert.org/vuls/id/745607 | third party advisory us government resource |