var-200212-0717
Vulnerability from variot

Serv-U FTP server 3.0, 3.1 and 4.0.0.4 does not accept new connections while validating user folder access rights, which allows remote attackers to cause a denial of service (no new connections) via a series of MKD commands. A denial of service vulnerability has been reported for Serv-U FTP server. The vulnerability is a result of Serv-U FTP Server processing certain commands. When the Serv-U server receives a MKD command it attempts to verify whether the user that issued the command has sufficient rights. When performing this verification, it will not accept any more connections. An attacker that issues many such commands will prevent the server from accepting connections for an indefinite period of time thus creating the denial of service condition

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