From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Mar 01 2004 - 11:01:06 CST

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TITLE:
WFTPD Server/Pro Server Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA11001

VERIFY ADVISORY:
http://secunia.com/advisories/11001/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
From remote

SOFTWARE:
WFTPD Server 3.x
WFTPD Pro Server 3.x

DESCRIPTION:
axl has discovered multiple vulnerabilities in WFTPD Server and WFTPD
Pro Server, which can be exploited by malicious users to compromise a
vulnerable system and cause a DoS (Denial of Service).

1) A boundary error within a routine for handling arguments supplied
to the "LIST", "NLST", and "STAT" FTP commands can be exploited to
cause a buffer overflow. This can be achieved by passing a specially
crafted argument, which starts with the "-" character followed by an
overly long string and a space, to any of the affected commands.

Successful exploitation may allow execution of arbitrary code with
the privileges of the FTP server.

The vulnerability has been reported in the following versions:

* WFTPD Pro Server 3.21 Release 1
* WFTPD Pro Server 3.20 Release 2
* WFTPD Server 3.21 Release 1
* WFTPD Server 3.10 Release 1

2) Various errors within the routines for handling FTP commands can
be exploited to cause the FTP server to consume 100% CPU and memory
resources and eventually crash it by sending extremely large amounts
of data without terminating characters.

3) When the option "XeroxDocutech" is set to "1", an off-by-one error
can be exploited to crash the FTP server by supplying a specially
crafted "MKD" or "XMKD" FTP command.

The DoS vulnerabilities have been reported in WFTPD Pro Server 3.21
Release 1. Other versions may also be affected.

SOLUTION:
Restrict access allowing only trusted users and IP addresses to
access the FTP server.

Use another product.

PROVIDED AND/OR DISCOVERED BY:
axl

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