Rule:

--
Sid: 
1623

--
Summary:
This event is generated when activity relating to spurious ftp traffic is detected on the network.

--
Impact:
Varies from information gathering to a serious compromise of an ftp server.

--
Detailed Information:
FTP is used to transfer files between hosts. This event is indicative of spurious activity in FTP traffic between hosts.

The event may be the result of a transfer of a known protected file or it could be an attempt to compromise the FTP server by overflowing a buffer in the FTP daemon or service.

--
Attack Scenarios:
A user may transfer sensitive company information to an external party using FTP.

An attacker might utilize a vulnerability in an FTP daemon to gain access to a host, then upload a Trojan Horse program to gain control of that host.

--
Ease of Attack:
Simple.

--
False Positives:
None Known

--
False Negatives:
None Known

--
Corrective Action:
Disallow access to FTP resources from hosts external to the protected network.

Use secure shell (ssh) to transfer files as a replacement for FTP.

--
Contributors:
Sourcefire Research Team
Brian Caswell <brian.caswell@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

--
Additional References:

--
