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TITLE:
Ipswitch WS_FTP Server FTP Log Server Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA26040

VERIFY ADVISORY:
http://secunia.com/advisories/26040/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
WS_FTP Server 6.x
http://secunia.com/product/14782/

DESCRIPTION:
Justin Seitz 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 an error within the FTP Log Server
(ftplogsrv.exe) when handling certain messages. This can be exploited
to crash a server by sending specially crafted datagrams to the
vulnerable service (default port 5151/UDP).

The vulnerability is confirmed in FTP Log Server (ftplogsrv.exe)
version 7.5.29.0 included in WS_FTP Server 6. Other versions may also
be affected.

SOLUTION:
Restrict network access to the affected service.

PROVIDED AND/OR DISCOVERED BY:
Justin Seitz, VDA Labs

ORIGINAL ADVISORY:
http://www.vdalabs.com/tools/ipswitch.html

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