NGSSoftware Insight Security Research Advisory
Name: Trigger abuse of MDSYS.SDO_TOPO_DROP_FTBL Systems Affected: Oracle 10g R1 and R2 (10.1.0.5 and 10.2.0.2) Severity: High Vendor URL: http://www.oracle.com/ Author: David Litchfield [ firstname.lastname@example.org ] Reported: 23rd July 2008 Date of Public Advisory: 13th January 2009 Advisory number: #NISR13012009 CVE: CVE-2008-3979
Oracle has just released a fix for a flaw that, when exploited, allows a low privileged authenticated database user to gain MDSYS privileges. This can be abused by an attacker to perform actions as the MDSYS user.
MDSYS.SDO_TOPO_DROP_FTBL is one of the triggers that forms part of the Oracle Spatial Application. It is vulnerable to SQL injection. When a user drops a table the trigger fires. The name of the table is embedded in a dynamic SQL query which is then executed by the trigger. Note that the Oracle advisory states that the attacker requires the DROP TABLE and CREATE PROCEDURE privileges. This is not the case and only CREATE SESSION privileges are required.
Oracle was alerted to this flaw on the 23rd July 2008. A patch has now been made available:
NGSSQuirreL for Oracle, an advanced vulnerability assessment scanner designed specifically for Oracle, can be used to accurately determine whether your servers are vulnerable to these flaws. More information about NGSSQuirreL for Oracle can be found here:
NGSSoftware, an NCC Group Company, develops vulnerability assessment and compliancy tools for database servers including Oracle, Microsoft SQL Server, DB2, Sybase and Informix. Headquartered in the United Kingdom NGS has offices in London, St. Andrews (UK), Brisbane, and Perth (Australia) and Seattle in the United States; NGS provide services to some of the largest and most demanding organizations around the globe.
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