Hi,

it seems that there are situations, when the anonymous-ftp check in Nessus
gives false negatives. We have the case of a printer, in which the
login to an ftp server does not require a password:

> ftp x.x.x.x
Connected to x.x.x.x
220 FTP server ready
User (y.y.y.y:(none)): anonymous
230 Password not required for anonymous
ftp>

The nessus plugin, which uses the NASL function "ftp_log_in" does
not catch this anonymous ftp, because ftp_log_in (judging from the
source code) expects the ftp server to request a password
(331 Guest login ok, type name and password).

Maybe ftp_log_in should be corrected to also take into account
situations as described above?

Greetings,

Bernd

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