[NEWS] Oracle SYS_CONTEXT Procedure Buffer Overflow Vulnerability

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Date: 12 Sep 2004 14:16:05 +0200

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  Oracle SYS_CONTEXT Procedure Buffer Overflow Vulnerability
------------------------------------------------------------------------

SUMMARY

A buffer overflow vulnerability was found in the SYS_CONTEXT procedure in
Oracle Database Server allowing a valid database user to execute arbitrary
code.

DETAILS

Vulnerable Systems:
 * Oracle 9i Release 2 versions 9.2.0.0 up to and including 9.2.0.4
(Windows platform only)

Immune Systems:
 * Oracle 9i Release 1
 * Oracle 10g

The vulnerability can be exploited by any valid database user able to
execute SQL commands via SQL Plus. The buffer overflow can then be
exploited by calling the SYS_CONTEXT() function. As with all buffer
overflows the cause for the vulnerability is either no bounds checking or
a degenerate case leading to an overwrite of the buffer due to a
programming error when performing bounds checking.

Patch Availability:
Please see MetaLink Document ID 281189.1 for the patch download procedures
and for the Patch Availability Matrix for this Oracle Security Alert which
can be found at:
 
<http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=281189.1> http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=281189.1

Disclosure Timeline
2 September 2003 Oracle was informed
2 September 2003 Bug confirmed
31 August 2004 Oracle published alert 68

ADDITIONAL INFORMATION

The information has been provided by
<mailto:ak@red-database-security.com> Kornbrust, Alexander - Red Database
Security.
The original article can be found at:
<http://www.red-database-security.com/advisory/advisory_20040903_2.htm>
http://www.red-database-security.com/advisory/advisory_20040903_2.htm

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