[NT] NetFile FTP Denial of Service (Nonexisting Username)
From: SecuriTeam (support_at_securiteam.com)
To: email@example.com Date: 21 Apr 2004 19:07:02 +0200
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion
The SecuriTeam alerts list - Free, Accurate, Independent.
Get your security news from a reliable source.
- - - - - - - - -
NetFile FTP Denial of Service (Nonexisting Username)
About <http://www.fastream.com/netfileserver.htm> NETFile: "Secure,
multi-threaded FTP/HTTP server combined, featuring automatic virtual
links, U/D ratios, quotas, authentication and extremely fast directory and
file caches. Other features include: User and group permissions with
permissions for all standard FTP and HTTP commands. Serving from behind
NAT/PAT. HTTP file uploading and management. Free for personal use;
professional license is required for commercial usage".
By sending a crafted USER and PASS strings an attacker can crash the FTP
* Net File version 6.5.1 and prior
* Net File version 188.8.131.521
The program is unable to manage nonexistent user name in the login
procedure. To crash the server simply send request like this:
If the user anUsername does not exist in the system, the server can be
The information has been provided by <mailto:firstname.lastname@example.org>
This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to: email@example.com
In order to subscribe to the mailing list, simply forward this email to: firstname.lastname@example.org
The information in this bulletin is provided "AS IS" without warranty of any kind.
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.