Check Point Advisories

NTP Daemon _IO_str_init_static_internal Denial of Service (CVE-2016-7434)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-1040
Date Published:	23 Nov 2016
Severity:	Critical
Last Updated:	Wednesday 11 January, 2017
Source:
Industry Reference:	CVE-2016-7434
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	NTP prior to 4.2.8p9
Vulnerability Description	A denial of service vulnerability exists in the Network Time Protocol daemon (NTPD). The vulnerability is due to a null pointer dereference in the _IO_str_init_static_internal() function. A remote attacker can exploit this vulnerability by sending a crafted packet to the target service. Successful exploitation may result in denial-of-service conditions.

Protection Overview

This protection detects 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 NTP Daemon _IO_str_init_static_internal Denial of Service 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: NTP Enforcement Violation.
Attack Information: NTP Daemon _IO_str_init_static_internal Denial of Service