Security Bulletin: IBM® DB2® LUW contains a vulnerability in which an ALTER TABLE statement may cause the DB2 server to terminate abnormally when AUTO_REVAL is set to IMMEDIATE . (CVE-2014-6159)

Summary

IBM DB2 contains a vulnerability in which an ALTER TABLE statement may cause the DB2 server to terminate abnormally when AUTO_REVAL is set to IMMEDIATE . This could result in a DB2 server crash; if so, the server would need to be restarted.

Vulnerability Details

CVE ID: CVE-2014-6159

DESCRIPTION:
IBM DB2 contains a disruption of service vulnerability. A remote, authenticated DB2 user could exploit this vulnerability when DB2 is configured with immediate auto revalidation (i.e. AUTO_REVAL configuration parameter is set to IMMEDIATE). The user would need valid security credentials to connect to the database and would need to execute specially crafted ALTER table statements (that require control privileges on the target table). Note: the AUTO_REVAL configuration parameter is set to DEFERRED by default.

CVSS:
CVSS Base Score: 6.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/97708&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:S/C:N/I:N/A:C)

Affected Products and Versions

All fix pack levels of IBM DB2 V9.7, V10.1 and V10.5 editions listed below and running on AIX, Linux, HP, Solaris or Windows are affected.

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

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

IBM® DB2® pureScale™ Feature for Enterprise Server Edition, V9.8, running on AIX or Linux is affected.

Remediation/Fixes

The recommended solution is to apply the appropriate fix for this vulnerability.

FIX:

The fix for DB2 and DB2 Connect release V9.7 is in V9.7 FP10, V10.1 is in V10.1 FP5 and V10.5 is in V10.5 FP5, available for download from Fix Central.

Customers running any vulnerable fixpack level of an affected Program, V9.8 can contact support to obtain a special build containing an interim fix for this issue. The special build is available based on the most recent fixpack level for each impacted release: DB2 V9.8 FP5. It can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability. Additionally fixes based on 9.7 FP9a or DB2 V10.1 FP4 will be made available on request.

Refer to the folowing chart to determine how to proceed to obtain a needed fixpack or special build.

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.

Note:_ IBM’s statements regarding its plans, directions, and intent are subject to change or withdrawal without notice at IBM’s 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._

Workarounds and Mitigations

Update the DB2 configuration parameter AUTO_REVAL to any value other than IMMEDIATE.