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Exim DKIM DNS Decoding Buffer Overflow (CVE-2012-5671)


Check Point Reference: CPAI-2012-800
Date Published:
Source: Exim Advisory SA51098
Industry Reference(s): CVE-2012-5671
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
Exim Project Exim 4.70 to 4.80
Vulnerability Description
A heap buffer overflow vulnerability has been reported in Exim DKIM.
Vulnerability Details
The vulnerability is due to a heap buffer overflow while handling certain DKIM DNS records. A remote attacker can exploit this issue by sending a specially crafted request to the target. Successful exploitation would allow an attacker to execute arbitrary code on the target.

Protection Overview
This protection will detect and block the transferring of malicious data to the target client.

In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

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

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  1. In the IPS tab, click Protections and find the Exim DKIM DNS Decoding Buffer Overflow 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: DNS Enforcement Violation
Attack Information: Exim DKIM DNS Decoding Buffer Overflow