Check Point Advisories

Tftpd32 DNS Server Buffer Overflow

Check Point Reference: CPAI-2012-315
Date Published: 3 Sep 2012
Severity: High
Last Updated: Sunday 07 February, 2016
Source:
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description A buffer overflow vulnerability has been reported in Tftpd32. The vulnerability is due to an error in the way the DNS component of Tftpd32 handles specially crafted domain labels. A remote attacker can exploit this issue by sending a specially crafted DNS query to a vulnerable Tftpd32 server. Successful exploitation could allow an attacker to execute arbitrary code on the target server, in the security context of the logged-on user.

Protection Overview

This protection will detect and block specially crafted DNS requests.

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 Tftpd32 DNS Server 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:  DNS Enforcement Violation.
Attack Information:  Tftpd32 DNS Server Buffer Overflow

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