Check Point Advisories

Tftpd32 DNS Server Buffer Overflow - ver 2

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1532
Date Published:	8 May 2014
Severity:	High
Last Updated:	Thursday 08 May, 2014
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Philippe Jounin TFTPD32 v4.00
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.

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

In the IPS tab, click Protections and find the Tftpd32 DNS Server Buffer Overflow - ver 2 protection using the Search tool and Edit the protection's settings.
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 - ver 2