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AUSCERT External Security Bulletin Redistribution
ESB-2012.0601.2
Unauthorized File Access Security Vulnerability in DB2 XML Feature
22 August 2012
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM DB2
Publisher: IBM
Operating System: AIX
Linux variants
HP-UX
Solaris
Windows
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2012-0713
Reference: ESB-2012.0601
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21592556
Revision History: August 22 2012: Updated document to include V9.5 FP10 download URL
June 22 2012: Initial Release
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Security Bulletin: Unauthorized File Access Security Vulnerability in DB2 XML
Feature (CVE-2012-0713)
Flash (Alert)
Abstract
Vulnerability in IBM DB2 XML Feature could allow a remote attacker to view XML
files owned by the DB2 instance owner.
VULNERABILITY DETAILS
CVE ID: CVE-2012-0713
DESCRIPTION:
The IBM DB2 products listed below contain a security vulnerability in the DB2
XML Feature which could allow a malicious user to remotely exploit and view XML
files owned by the DB2 instance owner. To exploit the vulnerability, the user
would need to have valid security credentials, CONNECT privilege to the
database and be able to execute a specially crafted SQL statement.
CVSS:
CVSS Base Score: 4
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/73520 for the current
score
CVSS Environmental Score*: Undefined
CVSS String: (AV:N/AC:L/Au:S/C:P/I:N/A:N)
AFFECTED PLATFORMS:
The following IBM DB2 editions running on AIX, Linux, HP, Solaris and Windows:
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
The following IBM V9.8 editions running on AIX and Linux:
IBM DB2 pureScale Feature for Enterprise Server Edition
Note that the vulnerability does not exist in DB2 V9.1.
REMEDIATION:
There is no workaround but there is mitigation for this vulnerability. Fixes are
available as well.
Mitigation:
To exploit the vulnerability, the user would need to be able to connect to the
database and execute an SQL statement. The exposure can be reduced by revoking
CONNECT privilege from PUBLIC. Use the following command to revoke CONNECT
privilege from PUBLIC:
REVOKE CONNECT ON DATABASE FROM PUBLIC
To obtain more information on the REVOKE database authority command, see the
following:
DB2 V9.8:
http://publib.boulder.ibm.com/infocenter/db2luw/v9r8/topic/com.ibm.db2.luw.sql.ref.doc/doc/r0000981.html
DB2 V9.7:
http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/topic/com.ibm.db2.luw.sql.ref.doc/doc/r0000981.html
DB2 V9.5:
http://publib.boulder.ibm.com/infocenter/db2luw/v9r5/topic/com.ibm.db2.luw.sql.ref.doc/doc/r0000981.html
Fix:
The fix for this vulnerability is available for download for DB2 release V9.7
Fix Pack 6 and V9.8 Fix Pack 5.
For V9.5, the fix is planned to be made available in a future fix pack.
For V9.1, the vulnerability is not applicable.
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
V9.5 FP10 IC81461 http://www.ibm.com/support/docview.wss?uid=swg24033308
V9.7 FP6 IC81462 http://www.ibm.com/support/docview.wss?uid=swg24032754
V9.8 FP5 IC81839 http://www.ibm.com/support/docview.wss?uid=swg24032798
A special build with the interim fix will be made available for DB2 V9.5 FP9.
Please contact your service representative to obtain the special build and
reference the APAR number for the release you want:
Contact Technical Support:
In the United States and Canada dial 1-800-IBM-SERV
View the support contacts for other countries outside of the United States.
Electronically open a Service Request with DB2 Technical Support.
REFERENCES:
Complete CVSS Guide
On-line Calculator V2
X-Force Vulnerability Database
CVE-2012-0713
*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
Note: IBMs statements regarding its plans, directions, and intent are subject to
change or withdrawal without notice at IBMs sole discretion. Information
regarding potential future products is intended to outline our general product
direction and it should not be relied on in making a purchasing decision. The
information mentioned regarding potential future products is not a commitment,
promise, or legal obligation to deliver any material, code or functionality.
Information about potential future products may not be incorporated into any
contract. The development, release, and timing of any future features or
functionality described for our products remains at our sole discretion.
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