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Postfix IPv6 Relaying Security Issue (CVE-2005-0337)


Check Point Reference: CPAI-2012-1330
Date Published:
Industry Reference(s): CVE-2005-0337
Protection Provided by: Security Gateway
  • R70
  • R71
  • R75
Who is Vulnerable?
Postfix Project Postfix 2.1.3 to 2.1.4-4
Postfix Project Postfix 2.1.3-1ubuntu17
Vulnerability Description
There is a vulnerability in the way Postfix handles the relaying of e-mail messages A successful attack allows an attacker to use the target Postfix as an open relay to MX hosts with IPv6addresses.
Vulnerability Details
In certain configurations, the vulnerable Postfix becomes an open relay for mail addressed to MX host with IPv6 addresses. An attacker sends a email from untrusted host through a vulnerable Postfix server. The email destinationdomain contains a MX record which has a AAAA (IPv6) record. The email is relayed by the Postfix server, triggering the vulnerability.

Protection Overview
This protection will detect and block arbitrary mail ent by the attacker

To configure the defense, select your product from the list below and follow the related protection steps.

How Can I Protect My Network?

  1. In the IPS tab, click Protections and find the Postfix IPv6 Relaying Security Issue protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: SMTP Protection Violation
Attack Information: Postfix IPv6 Relaying Security Issue