Rule:

--
Sid:
3077

--
Summary:
This event is generated when an attempt is made to exploit a buffer
overflow associated with the RNFR command of the IPSwitch WS_FTP server.

--
Impact:
A successful attack may cause a denial of service or a buffer overflow
and the subsequent execution of arbitrary code on a vulnerable server.

--
Detailed Information:
A vulnerability exists in the way that the IPSwitch WS_FTP service
handles the RNFR command.  An excessively long parameter supplied to the
command can trigger a denial of service or a buffer overflow and the
subsequent execution of arbitrary code on a vulnerable server.

--
Affected Systems:
	IPSwitch WS_FTP 4.x, 5.x

--
Attack Scenarios:
An attacker can supplied an overly long parameter with the RNFR command,
possibly causing denial of service or a buffer overflow.

--
Ease of Attack:
Simple.

--
False Positives:
None known.

--
False Negatives:
None known.

--
Corrective Action:
Upgrade to the latest non-affected version of the software.

--
Contributors:
Sourcefire Research Team
Judy Novak <judy.novak@sourcefire.com>

--
Additional References:

Secunia:
http://secunia.com/advisories/13334

--
