NGSSoftware Insight Security Research Advisory

Name: PLSQL Injection in Oracle Application Server
Systems Affected: Oracle Application Server 9.0.4.3, 10.1.2.2, 10.1.4.1
Severity: Critical
Vendor URL: http://www.oracle.com/
Author: David Litchfield [ davidl@ngssoftware.com ]
Reported: 9th October 2007
Date of Public Advisory: 15th July 2008
Advisory number: #NISR15072008
CVE: CVE-2008-2589


Overview
********
Oracle has just released a fix for a flaw that, when exploited, allows an
unauthenticated attacker on the Internet to gain full control of a backend
Oracle database server via the front end web server.

Details
*******
Oracle Application Server installs a number of PLSQL packages in the backend
database server. One of these is the WWV_RENDER_REPORT package and it is
vulnerable to PLSQL injection. This package uses definer rights execution
and therefore executes with the privileges of the owner, in this case the
highly privileged PORTAL user.

Specifically, the SHOW procedure takes as its 2nd argument the name of a
function to execute and this is embedded with a dynamically executed
anonymous block of PLSQL without first being sanitized. Because it is a
block of anonymous PLSQL, an attacker can exploit this flaw to run any SQL
statement, for example, create new users, grant dba privileges, delete or
modify data. This is achieved by wrapping the statement(s) within an
"execute immediate" statement and specifiying the autonomous_transaction
pragma.

Fix Information
***************
Oracle was alerted to this flaw on the 9th October 2007. A patch has now
been made available:

http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuj
ul2008.html

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:

http://www.ngssoftware.com/products/database-security/ngs-squirrel-oracle.ph
p

About NGSSoftware
*****************
NGSSoftware 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; NGSConsulting provide services to some of the largest and most
demanding organizations around the globe.

http://www.ngssoftware.com/
Telephone +44 208 401 0070
Fax +44 208 401 0076

--
E-MAIL DISCLAIMER

The information contained in this email and any subsequent
correspondence is private, is solely for the intended recipient(s) and
may contain confidential or privileged information. For those other than
the intended recipient(s), any disclosure, copying, distribution, or any
other action taken, or omitted to be taken, in reliance on such
information is prohibited and may be unlawful. If you are not the
intended recipient and have received this message in error, please
inform the sender and delete this mail and any attachments.

The views expressed in this email do not necessarily reflect NGS policy.
NGS accepts no liability or responsibility for any onward transmission
or use of emails and attachments having left the NGS domain.

NGS and NGSSoftware are trading names of Next Generation Security
Software Ltd. Registered office address: 52 Throwley Way, Sutton, SM1
4BF with Company Number 04225835 and VAT Number 783096402

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/