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Preemptive Protection against FileCOPA FTP Server Buffer Overflow Vulnerability

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Check Point Reference: CPAI-2007-009
Date Published:
Severity:
Last Updated:
Source: Secunia Research: 25/07/2006
Industry Reference(s): CVE-2006-3768
Protection Provided by: VPN-1
  • NGX R62
  • NGX R61
  • NGX R60
InterSpect
  • NGX
Who is Vulnerable?
FileCOPA version 1.01 (released on 2006-07-18)
Vulnerability Description
FileCOPA FTP server is an FTP server application for Microsoft Windows used for anonymous operations. A denial of service vulnerability has been reported in FileCOPA FTP Server. The vulnerability could be exploited by remote attackers to crash the application via a specially crafted FTP command sent to an affected server.
Update/Patch Available
Upgrade to FileCOPA version 1.01 (released on 2006-07-21):
http://www.filecopa.com/download.html
Vulnerability Details
The vulnerability is caused due to a buffer overflow error in the FTP service (filecpnt.exe) when handling overly long arguments passed to certain FTP commands (CWD, DELE, MDTM and MKD). A remote attacker can exploit this flaw via a specially crafted FTP command with an overly long string in its parameter. Successful exploitation may allow an attacker to create a denial of service condition or execute arbitrary code on an affected system.

Protection Overview
Overly long FTP commands may cause a buffer overflow on an affected FTP server. The protection addresses this issue by validating the length of the commands and blocking them if they exceed a certain length. No update is required to address this vulnerability.

Users of VPN-1 NGX R62, R61, R60 and InterSpect NGX are protected against this vulnerability if the FTP protection for blocking overly long commands addressed in the Protection section of CPAI-2006-151 has been applied.

To configure the defense, select your product from the list below and follow the related protection steps.

VPN-1 NGX R62, R61, R60 & InterSpect NGX

How Can I Protect My Network?
Users of the versions mentioned above are protected against the vulnerability if the protection outlined in CPAI-2006-151 has been applied.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: FTP Patterns Protection Violation
Attack Information:
DELE Buffer Overflow Attempt
MDTM Buffer Overflow Attempt
FTP Command Buffer Overflow Attempt