Security Bulletin: IBM DB2 Security Vulnerability in SQLJ.DB2_INSTALL_JAR (CVE-2012-2194).

Content

VULNERABILITY DETAILS

CVE ID: CVE-2012-2194

DESCRIPTION:

The IBM DB2 products listed below contain a security vulnerability that could
allow an authenticated user, without proper authority, to overwrite JAR files.

SQLJ.DB2_INSTALL_JAR is a built-in stored procedure used to install JAR files to be used by Java stored procedures. A malicious user could use the stored procedure to replace existing JAR files and achieve remote code execution.

To exploit the vulnerability, the user would need to have valid security credentials to connect to the database and execute the SQLJ.DB2_INSTALL_JAR stored procedure. By default, PUBLIC is granted EXECUTE privilege to SQLJ.DB2_INSTALL_JAR. To reduce the exposure, revoke the EXECUTE privilege from PUBLIC and only grant EXECUTE to users that have a need to install JAR files.



CVSS:
CVSS Base Score: 9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/76117 for the current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:N/AC:L/Au:S/C:C/I:C/A:C)


AFFECTED PLATFORMS:

The vulnerability only affects the Windows platform. AIX, Linux, Solaris and HP are not affected. The following IBM DB2 V9.1, V9.5, V9.7 and V10.1 editions running on Windows are affected:


IBM® DB2® 10.1 Express Edition
IBM® DB2® 10.1 Workgroup Server Edition
IBM® DB2® 10.1 Enterprise Server Edition
IBM® DB2® 10.1 Advanced Enterprise Server Edition
IBM® DB2® Connect™ 10.1 Application Server Edition
IBM® DB2® Connect™ 10.1 Enterprise Edition
IBM® DB2® Connect™ 10.1 Unlimited Edition for System i®
IBM® DB2® Connect™ 10.1 Unlimited Edition for System z®

IBM® DB2® 9.7 Express Edition
IBM® DB2® 9.7 Workgroup Server Edition
IBM® DB2® 9.7 Enterprise Server Edition
IBM® DB2® 9.7 Advanced Enterprise Server Edition
IBM® DB2® Connect™ 9.7 Application Server Edition
IBM® DB2® Connect™ 9.7 Enterprise Edition
IBM® DB2® Connect™ 9.7 Unlimited Edition for System i®
IBM® DB2® Connect™ 9.7 Unlimited Edition for System z®

IBM® DB2® 9.5 Express Edition
IBM® DB2® 9.5 Workgroup Server Edition
IBM® DB2® 9.5 Enterprise Server Edition
IBM® DB2® 9.5 Advanced Enterprise Server Edition
IBM® DB2® Connect™ 9.5 Application Server Edition
IBM® DB2® Connect™ 9.5 Enterprise Edition
IBM® DB2® Connect™ 9.5 Unlimited Edition for System i®
IBM® DB2® Connect™ 9.5 Unlimited Edition for System z®

IBM® DB2® 9.1 Express Edition
IBM® DB2® 9.1 Workgroup Server Edition
IBM® DB2® 9.1 Enterprise Server Edition
IBM® DB2® 9.1 Advanced Enterprise Server Edition
IBM® DB2® Connect™ 9.1 Application Server Edition
IBM® DB2® Connect™ 9.1 Enterprise Edition
IBM® DB2® Connect™ 9.1 Unlimited Edition for System i®
IBM® DB2® Connect™ 9.1 Unlimited Edition for System z®

NOTE: The DB2 Connect products mentioned are affected only if a local database has been created.

REMEDIATION:
The recommended solution is to apply the appropriate fix for this vulnerability. Mitigation is also available.

Fix:
The fix for this vulnerability is available for download.

In general, DB2 fix packs can be downloaded from the following site: http://www.ibm.com/support/docview.wss?uid=swg27007053. You may download the specific fix pack you need from the following:

Release	APAR	Download URL
V9.1 FP12	IC84019	http://www.ibm.com/support/docview.wss?uid=swg24033023
V9.5 FP10	IC84711	http://www.ibm.com/support/docview.wss?uid=swg24033308
V9.7 FP7	IC84714	http://www.ibm.com/support/docview.wss?uid=swg24033685
V10.1 FP1	IC84716	http://www.ibm.com/support/docview.wss?uid=swg24033451

Workaround:
None known; apply fixes

Mitigation:
To exploit the vulnerability, the user would need to be able to connect to the database and call the stored procedure SQLJ.DB2_INSTALL_JAR. Revoking EXECUTE privilege from PUBLIC on the stored procedure would allow you to control who can call the stored procedure. Use the following SQL statement to revoke the privilege:

REVOKE EXECUTE ON SQLJ.DB2_INSTALL_JAR FROM PUBLIC

To obtain more information on the REVOKE routine privileges statement, see the following for DB2 V10.1. The statement syntax is the same for other DB2 releases.

DB2 V10.1:
http://publib.boulder.ibm.com/infocenter/db2luw/v10r1/topic/com.ibm.db2.luw.sql.ref.doc/doc/r0007700.html

REFERENCES:

Complete CVSS v2 Guide

On-line Calculator V2

X-Force Vulnerability Database

CVE-2012-2194

ACKNOWLEDGEMENT:
This vulnerability was reported to IBM by Martin Rakhmanov of Application Security Inc.


CHANGE HISTORY:
August 8, 2012 - Document created.
August 21, 2012 - V9.5 FP10 has shipped. Updated document to include V9.5 FP10 download URL.
September 17, 2012 - V10.1 FP1 has shipped. Updated document to include V10.1 FP1 download URL.
November 6, 2012 - V9.7 FP7 has shipped. Updated document to include V9. FP7 download URL.

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Flash.

Note: According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

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