Check Point Advisories

Oracle Create Database Link Buffer Overflow

Check Point Reference: CPAI-2005-188
Date Published: 18 Feb 2010
Severity: High
Last Updated: Tuesday 10 November, 2015
Source:
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Oracle Database is an enterprise-level relational database suite. A database link is an object in a local Oracle database that allows local access to objects on a remote database. The remote database can be either an Oracle or a non-Oracle database. There is a vulnerability in Oracle database products. A specially crafted parameter, specified in the Create Database Link command, could trigger buffer overflow in the database server process. A remote attacker can use this vulnerability to create a denial-of-service condition affecting the entire database. In a simple attack case, the vulnerable service drops all active connections. The service continues to accept connections to the Oracle server. However, because of memory corruption, user authentication always fails, even with valid user credentials. Therefore, a denial of service condition exists until the service is restarted. In a more sophisticated attack case, this vulnerability may be exploited for code execution. In this case, the behavior of the attack target is dependent on the code injected. Any code injected will run in privileges of the local system depending on the operating system that the vulnerable Oracle server is running on.

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 Create Database Link Buffer Overflow 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 Create Database link buffer overflow

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