[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
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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 126.96.36.1991
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>
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