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Oracle Database DBMS_AQELM Package Buffer Overflow Vulnerability

15.07.08

BACKGROUND

Oracle Database Server is a family of database products that range from personal databases to enterprise solutions. Further information is available at the following URL.

http://www.oracle.com/database/index.html

DESCRIPTION

Remote exploitation of a buffer overflow vulnerability in the DBMS_AQELM package in Oracle Corp.'s Oracle Database product allows attackers to execute arbitrary code with the privileges of the database user.

This vulnerability exists due to improper input validation when handling a parameter passed to a procedure within the DBMS_AQELM package. Since the parameter is not properly validated, providing a long string can cause a buffer overflow to occur. This results in corruption of the database and could allow for the execution of arbitrary code as the database user.

ANALYSIS

Exploitation of this vulnerability results in database corruption and possibly arbitrary code execution with the privileges of the oracle user on Unix, and the "SYSTEM" user on Windows. This grants an attacker full reign over the database.

In order to exploit this vulnerability, an attacker must have access to a database account with privilege to execute the DBMS_AQELM package. In a default install, users with the Advanced Queue Administrator Role (AQ_ADMINISTRATOR_ROLE) have this privilege.

DETECTION

iDefense confirmed the existence of this vulnerability in Oracle Database version 10.2.0.3 and 11.1.0.6 with the October 2007 CPU applied. Previous versions may also be affected.

WORKAROUND

iDefense is currently unaware of any workaround for this issue.

VENDOR RESPONSE

Oracle Corp. has addressed this vulnerability with the release of their July 2008 Critical Patch Update. For more information, visit the following URL.

http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujul2008.html

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-2607 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

12/18/2007 Initial vendor notification
12/19/2007 Initial vendor response
07/15/2008 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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