Check Point Advisories

TFTP Server Error Packet Handling Buffer Overflow (CVE-2008-2161)

Check Point Reference: CPAI-2008-293
Date Published: 18 Oct 2009
Severity: Critical
Last Updated: Sunday 18 October, 2009
Source:
Industry Reference:CVE-2008-2161
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description TFTP server is an open source Trivial File Transfer Protocol server service provided for both Linux and Microsoft Windows platforms. The product facilitates the transfer of files to or from the server. A buffer overflow vulnerability exists in TFTP servers. The flaw is due to improper handling of TFTP error packets with overly long error messages. An unauthenticated remote attacker can exploit this vulnerability by sending crafted TFTP error packets to the target host. Successful attack could allow arbitrary code execution with privileges of the server process, normally system on Windows platforms and root on UNIX/Linux platforms. If the attack is unsuccessful in code injection and execution, the target TFTP server process will terminate upon exploitation. If an attack results in successful code injection and its subsequent execution, the behaviour of the target host will depend on the intention of the attacker. Note that any code execution will be within the security context of the affected service.

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 TFTP Server Error Packet Handling 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:  TFTP Enforcement Violation.
Attack Information:  TFTP server error packet handling buffer overflow

×
  Feedback
This website uses cookies for its functionality and for analytics and marketing purposes. By continuing to use this website, you agree to the use of cookies. For more information, please read our Cookies Notice.
OK