[NT] Dynu FTP Server Directory Traversal Vulnerability

From: support@securiteam.com
Date: 08/22/01 

From: support@securiteam.com
To: list@securiteam.com
Subject: [NT] Dynu FTP Server Directory Traversal Vulnerability
Message-Id: <20010822055955.3F9AA138BF@mail.der-keiler.de>
Date: Wed, 22 Aug 2001 07:59:55 +0200 (CEST)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Dynu FTP Server Directory Traversal Vulnerability
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SUMMARY

 <http://www.dynu.com/dynuftpserver.asp> Dynu FTP Server is a
multithreaded FTP server supporting the RFC 959 protocol completely.
Features include support for multi-homed servers, user access management,
active log and much more. A security vulnerability in the product allows
attackers to traverse outside the normal bounding FTP root directory and
read arbitrary files on the system.

DETAILS

Vulnerable systems:
Dynu FTP Server version 1.05 and prior

Immune systems:
Dynu FTP Server version 1.06

By simply issuing a "cwd .." (cd ..) will get you one directory above the
chained root directory.

Solution:
Upgrade to the latest version 1.06.

ADDITIONAL INFORMATION

The information has been provided by
<mailto:Christoph.Heindl@fhs-hagenberg.ac.at> Christoph.Heindl.

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