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Ipswitch WS_FTP Server FTP Log Server Denial of Service

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Release Date:  2008-02-05    Last Update:  2008-08-29    Views:  7,260

Secunia Advisory SA28761

Where:

From local network

Impact:

DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Luigi Auriemma has discovered a vulnerability in Ipswitch WS_FTP Server, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to the improper handling of UDP packets within the FTP Log Server. This can be exploited to cause the service to stop responding to further log requests by sending multiple overly large datagrams (over 4096 bytes) within a short period of time to port 5151/UDP.

The vulnerability is confirmed in FTP Log Server (ftplogsrv.exe) version 7.9.14.0 included in WS_FTP Server 6.1. Other versions may also be affected.


Solution:
Update to WS_FTP Server version 6.1.1.

Provided and/or discovered by:
Luigi Auriemma

Original Advisory:
Ipswitch:
http://docs.ipswitch.com/WS_FTP_Server611/ReleaseNotes/index.htm?k_id=ipswitch_ftp_documents_worldwide_ws_ftpserverv611releasenotes#link12

Luigi Auriemma:
http://aluigi.altervista.org/adv/ftplogsrvz-adv.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Ipswitch WS_FTP Server FTP Log Server Denial of Service

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