Advisory: Bypass Oracle Logon Trigger

[ak () red-database-security com]

Name                Bypass Oracle Logon Trigger (7826485) [DB05]
Systems Affected        Oracle 8-10g Rel. 2
Severity                High Risk
Category                Bypass Security Feature Database Logon Trigger
Vendor URL              http://www.oracle.com/
Author              Alexander Kornbrust (ak at red-database-security.com)        
Advisory                17 April 2007 (V 1.00)


Details
#######
It is possible to bypass the Oracle database logon trigger. This can cause severe security problems.

Oracle database logon trigger are often used to restrict user access (e.g. based on time or ip addresses) and/or to do 
audit entries into (custom) tables. This can be bypassed on unpatched systems.

This advisory is available at
<http://www.red-database-security.com/advisory/bypass_oracle_logon_trigger.html>

Patch Information
#################
Apply the patches for Oracle CPU April 2007.


History
#######
07-jun-2006 Oracle secalert was informed
08-jun-2006 Bug confirmed
17-apr-2007 Oracle published CPU April 2007 [DB05]
17-apr-2007 Advisory published


Additional Information
######################
An analysis of the Oracle CPU April 2007 is available here 
<http://www.red-database-security.com/advisory/oracle_cpu_apr_2007.html>

This document will be updated during the next few days and weeks with the latest information.


(c) 2007 by Red-Database-Security GmbH
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