File: 1530.txt

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Rule:

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Sid: 
1530

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

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

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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.

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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.

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Ease of Attack:
Simple.

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False Positives:
None Known

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False Negatives:
None Known

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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.

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

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Additional References:

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