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TITLE:
FTPshell Server Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA16189

VERIFY ADVISORY:
http://secunia.com/advisories/16189/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
FTPshell Server 3.x
http://secunia.com/product/5435/

DESCRIPTION:
Reed Arvin has discovered a vulnerability in FTPshell Server, which
can be exploited by malicious users to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error when handling requests
that have issued a PORT command to 127.0.0.1 and then terminated
without the QUIT command. This can be exploited to crash the server
by sending 39 such requests.

The vulnerability has been confirmed in version 3.38. Prior versions
may also be affected.

SOLUTION:
Grant access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Reed Arvin

ORIGINAL ADVISORY:
http://reedarvin.thearvins.com/20050725-01.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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