Check Point Advisories

Win FTP Server WFTPSRV.exe LIST FTP Command Buffer Overflow (CVE-2009-0351)

Check Point Reference: CPAI-2009-368
Date Published: 11 Nov 2009
Severity: Medium
Last Updated: Wednesday 11 November, 2009
Source:
Industry Reference:CVE-2009-0351
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Win FTP server is marketed as a professional FTP server featuring speed, reliability and customization. The server incorporates various enhancements such as real-time information functionality, email notification, event management and product customization using JavaScript and VBScript. There exists a buffer overflow vulnerability in Win FTP server WFTPSRV.exe. The vulnerability is due to insufficient bounds checking on certain FTP service commands. A remote unauthenticated attacker can exploit this vulnerability by sending a specially crafted FTP LIST service command to the target server, potentially causing arbitrary code injection and execution with the privileges of the affected process. If an attack results in successful code injection and its subsequent execution, the behaviour of the target host will depend on the malicious code being executed. Note that any code execution will be within the security context of the affected service. If the attack is not successful in code injection and execution, the WFTPSRV.exe server process will terminate due to memory corruption, causing a denial of service condition.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Win FTP Server WFTPSRV.exe LIST FTP Command Buffer Overflow protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  FTP Enforcement Violation.
Attack Information:  Win FTP server WFTPSRV.exe LIST FTP command buffer overflow

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