Check Point Advisories

Symantec Firewall Malformed Requests (CVE-2004-0369)

Check Point Reference: CPAI-2004-180
Date Published: 28 Dec 2009
Severity: High
Last Updated: Monday 28 December, 2009
Source:
Industry Reference:CVE-2004-0369
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Multiple vulnerabilities exist in the Symantec Enterprise Firewall/VPN Appliance and Symantec Gateway Security products. These products contain firmware flaws which result an in improper enforcement of controls relative to incoming UDP traffic. These vulnerabilities enable an attacker to view and modify the firewall rules, and additionally to create a denial of service condition. The affected devices process all UDP traffic with a source port of 53 arriving at their External (WAN) interfaces as DNS responses. The vulnerable products fail to check their DNS request caches to ensure (by source and destination IP address verification) that the incoming datagram is a response to an actual request previously sent from within the local network. The target system will not exhibit any unusual behavior when the vulnerability is exploited for information disclosure. If these vulnerabilities are exploited to alter the configuration of the vulnerable system, this will result in a behavior change dependent on the new configuration settings. Alternatively, in the case of the denial-of-service attack, the target system will become unresponsive until restarted.

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

  1. In the IPS tab, click Protections and find the Symantec Firewall Malformed Requests protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Security Products Enforcement Violation.
Attack Information:  Symantec firewall malformed requests

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