Oracle 10g/9i wrapped procedure buffer overflow

NGSSoftware Insight Security Research Advisory

Name: Oracle 10g/9i wrapped procedure buffer overflow
Systems Affected: Oracle 10g/9i on all operating systems
Severity: High risk
Vendor URL: http://www.oracle.com/
Author: David Litchfield [ davidl at ngssoftware.com ]
Relates to: http://www.nextgenss.com/advisories/oracle-01.txt
Date of Public Advisory: 23rd December 2004
Advisory number: #NISR2122004J
Advisory URL: http://www.ngssoftware.com/advisories/oracle23122004J.txt

Description
***********
The code for PL/SQL procedures can be encrypted or “wrapped” to use the
Oracle term. When a wrapped procedure is created a buffer overflow
vulnerability can be triggered.

Details
*******
By placing an overly token in the text of a procedure that has been wrapped
with version 9 and stack based buffer is overflowed in the Oracle server
when the procedure is created. Exploitation of this allows an attacker to
run code as the Oracle user.

Fix Information
***************
A patch (#68) was released for this problem by Oracle. See
http://metalink.oracle.com/ for more details. NGSSQuirreL for Oracle
(http://www.nextgenss.com/squirrelora.htm), can be used to assess whether
your Oracle servers are vulnerable to this.

About NGSSoftware
*****************
NGSSoftware design, research and develop intelligent, advanced application
security assessment scanners. Based in the United Kingdom, NGSSoftware have
offices in the South of London and the East Coast of Scotland. NGSSoftware’s
sister company NGSConsulting, offers best of breed security consulting
services, specialising in application, host and network security
assessments.

http://www.ngssoftware.com/

Telephone +44 208 401 0070
Fax +44 208 401 0076

enquiries@ngssoftware.com