Check Point Advisories

Suspicious Sender Address

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0856
Date Published:	16 Jul 2015
Severity:	Medium
Last Updated:	Tuesday 11 August, 2015
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Most mail transfer agents perform certain normalizations over mail headers, including the sender address. A non-normalized sender address may imply a non-standard mail transfer agent, which could indicate suspicious activity.

Protection Overview

This protection will detect and block mail messages including non-normalized sender addresses.

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 Suspicious Sender Address 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: NNTP Protection Violation.
Attack Information: Suspicious Sender Address