Check Point Advisories

Oracle Database DBMS TNS Listener Denial of Service (CVE-2009-0991)

Check Point Reference: CPAI-2009-385
Date Published: 9 Mar 2010
Severity: Critical
Last Updated: Tuesday 09 March, 2010
Source:
Industry Reference:CVE-2009-0991
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Oracle Database Server is an enterprise-level relational database application suite. To extend the functionality of the Oracle Database Server, extra packages of related program objects, e.g., procedures, functions, variables, constants, cursors, and exceptions, are provided in order to better manage the data. The included stored procedures and functions, or subprograms, are called by name and optionally passed a set of parameters. They are essentially a set of SQL statements that are stored on the server-side, usually as precompiled SQL. Remote database clients can communicate SQL requests to the Oracle database server using TNS. A denial of service vulnerability exists in the Oracle Database Server. The vulnerability is due to an input validation error in the TNS Listener component when handling an invalid TNS data packet. Remote unauthenticated attackers could exploit this vulnerability by sending a specially crafted TNS packet. As a result of processing the malicious packet, the server process will terminate resulting in a denial of service condition.

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 Oracle Database DBMS TNS Listener Denial of Service 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:  Oracle Protection Violation.
Attack Information:  Oracle Database DBMS TNS Listener denial of service

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