From: Secunia Security Advisories (sec-advsecunia.com)
Date: Sat Jan 03 2004 - 03:51:22 CST

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TITLE:
Flash FTP Server Directory Traversal Vulnerabilities

SECUNIA ADVISORY ID:
SA10522

VERIFY ADVISORY:
http://www.secunia.com/advisories/10522/

CRITICAL:
Moderately critical

IMPACT:
Exposure of system information, Exposure of sensitive information

WHERE:
From remote

SOFTWARE:
Flash FTP Server 1.x

DESCRIPTION:
Dr_insane has reported vulnerabilities in Flash FTP Server, which can
be exploited by malicious users to conduct directory traversal
attacks.

The vulnerability is caused due to missing input validation which can
be exploited to retrieve arbitrary files outside the FTP root and
create directories in arbitrary locations via the "/.." character
sequence.

The vulnerability has been confirmed in version 1.0 (also identified
as 2.1).

SOLUTION:
Filter malicious characters and character sequences in a FTP proxy.

Grant only access to trusted users.

The impact of directory traversal attacks can be lessened by placing
the FTP root on a separate drive letter or by restricting access
using NTFS.

PROVIDED AND/OR DISCOVERED BY:
Dr_insane

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