Rule:

--
Sid:
1778

--
Summary:
This event is generated when an attempt is made to cause a Denial of Service (DoS) to an FTP server.

--
Impact:
Serious. Denial of Service.

--
Detailed Information:
Certain versions of Microsoft's IIS FTP service are vulnerable to a DoS attack. The condition exists when a user attempts to view the transfer status using the STAT command. If the user enters a large number of file globbing characters as an argument, the service will crash.

--
Affected Systems:
Microsoft IIS versions 4.0, 5.0, and 5.1
Cisco Building Broadband Service Manager 4.0.1 - 5.1
Cisco Call Manager 3.0 - 3.2
Cisco Unity Server 2.0 - 2.4

--
Attack Scenarios:
An attacker can cause the service to restart or hang, leaving the service unavailable to users.

--
Ease of Attack:
Medium

--
False Positives:
None Known

--
False Negatives:
None Known

--
Corrective Action:
Apply the appropriate vendor supplied patches.

--
Contributors:
Sourcefire Vulnerability Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Josh Sakofsky

-- 
Additional References:

--
