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Oracle Application Express Privilege Escalation Vulnerability

15.04.08

BACKGROUND

Oracle Application Express (Oracle APEX), formerly called HTML DB, is a rapid web application development tool for the Oracle database. For more information about Oracle Application Express, please visit following URL.

http://www.oracle.com/technology/products/database/application_express/index.html

DESCRIPTION

Local exploitation of a design error vulnerability in Oracle Corp.'s Application Express web application development tool allows attackers to gain elevated privileges.

The vulnerability exists in "run_ddl" function within the "wwv_execute_immediate" package. This package is included in the "flows_030000" schema. This function allows attackers to execute SQL commands as any database user, such as SYS.

ANALYSIS

Exploitation allows the attacker to execute SQL commands as any database user. In order to exploit this vulnerability, an attacker must have access to an account which can execute the "flows_030000.wwv_execute_immediate.run_ddl" function. On a default installation of Oracle Database 11g, the following non-DBA users can execute this function: WMSYS, WKSYS, FLOWS_030000, OUTLN.

If combined with other SQL injection vulnerabilities which give access to above accounts, an attacker with normal database user access can take control of the whole database and possibly the whole computer system.

DETECTION

iDefense confirmed the existence of this vulnerability in Oracle Application Express version 3.0.1.00.08, which is installed by default with Oracle Database 11g R1 (version 11.1.0.6.0). Previous versions may also be affected. However, Oracle Database 10g R2 does not install Oracle Application Express by default.

WORKAROUND

Exploitation of this vulnerability can be prevented, if this component is not being used, by uninstalling Oracle Application Express.

VENDOR RESPONSE

Oracle has addressed this issue within the April 2008 Critical Patch Update. For more information, visit the following URL.

http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuapr2008.html

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-1811 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

01/18/2008 Initial vendor notification
01/22/2008 Initial vendor response
04/15/2008 Coordinated public disclosure

CREDIT

This vulnerability was reported to iDefense by Joxean Koret.

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LEGAL NOTICES

Copyright © 2008 Verisign, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.