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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.7228
        IBM Db2 is vulnerable to denial of service with a specially
                      crafted query. (CVE-2023-43020)
                              4 December 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Db2
Publisher:         IBM
Operating System:  Linux variants
                   AIX
                   Windows
                   HP-UX
                   Solaris
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-43020  

Original Bulletin: 
   https://www.ibm.com/support/pages/node/7087180

Comment: CVSS (Max):  6.5 CVE-2023-43020 (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
         CVSS Source: IBM
         Calculator:  https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin:  IBM Db2  is vulnerable to denial of service with a
specially crafted query. (CVE-2023-43020)

Document Information

Document number    : 7087180
Modified date      : 01 December 2023
Product            : Db2 for Linux, UNIX and Windows
Component          : -
Software version   : 11.5, 11.1, 10.5
Operating system(s): Linux
                     AIX
                     Windows
                     HP-UX
                     Solaris

Security Bulletin


Summary

IBM Db2 is vulnerable to denial of service with a specially crafted query.

Vulnerability Details

CVEID: CVE-2023-43020
DESCRIPTION: IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server)
is vulnerable to denial of service with a specially crafted query.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
266166 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

+-------------------+----------+-------------------+
|Affected Product(s)|Version(s)|Applicable Editions|
+-------------------+----------+-------------------+
|IBM Db2            |10.5.0.11 |Server             |
+-------------------+----------+-------------------+
|IBM Db2            |11.1.4.7  |Server             |
+-------------------+----------+-------------------+
|IBM Db2            |11.5.x    |Server             |
+-------------------+----------+-------------------+

All platforms are affected.
Earlier releases (10.1, 9.7 etc.) may also be affected, but they are no longer
supported.

Remediation/Fixes

Customers running any vulnerable fixpack level of an affected Program, V10.5,
v11.1 and V11.5, can download the special build containing the interim fix for
this issue from Fix Central. These special builds are available based on the
most recent fixpack level for each impacted release: V10.5 FP11, V11.1.4 FP7,
and V11.5.8. They can be applied to any affected fixpack level of the
appropriate release to remediate this vulnerability.

+-------+----------------+--------+-------------------------------------------+
|Release|Fixed in fix    |APAR    |Download URL                               |
|       |pack            |        |                                           |
+-------+----------------+--------+-------------------------------------------+
|V10.5  |TBD             |DT209233|Special Build for V10.5 FP11:              |
|       |                |        |                                           |
|       |                |        |AIX 64-bit                                 |
|       |                |        |HP-UX 64-bit                               |
|       |                |        |Linux 32-bit, x86-32                       |
|       |                |        |Linux 64-bit, x86-64                       |
|       |                |        |Linux 64-bit, POWER big endian             |
|       |                |        |Linux 64-bit, POWER little endian          |
|       |                |        |Linux 64-bit, System z, System z9 or       |
|       |                |        |zSeries                                    |
|       |                |        |Solaris 64-bit, SPARC                      |
|       |                |        |Solaris 64-bit, x86-64                     |
|       |                |        |Windows 32-bit, x86                        |
|       |                |        |Windows 64-bit, x86                        |
+-------+----------------+--------+-------------------------------------------+
|V11.1  |TBD             |DT209233|Special Build for V11.1.4 FP7:             |
|       |                |        |                                           |
|       |                |        |AIX 64-bit                                 |
|       |                |        |Linux 32-bit, x86-32                       |
|       |                |        |Linux 64-bit, x86-64                       |
|       |                |        |Linux 64-bit, POWER little endian          |
|       |                |        |Linux 64-bit, System z, System z9 or       |
|       |                |        |zSeries                                    |
|       |                |        |Solaris 64-bit, SPARC                      |
|       |                |        |Windows 32-bit, x86                        |
|       |                |        |Windows 64-bit, x86                        |
+-------+----------------+--------+-------------------------------------------+
|V11.5  |TBD             |DT209233|Special Build for V11.5.0:                 |
|       |                |        |                                           |
|       |                |        |AIX 64-bit (for OS7.1)                     |
|       |                |        |                                           |
|       |                |        |                                           |
|       |                |        |Special Build for V11.5.8:                 |
|       |                |        |                                           |
|       |                |        |AIX 64-bit                                 |
|       |                |        |Linux 32-bit, x86-32                       |
|       |                |        |Linux 64-bit, x86-64                       |
|       |                |        |Linux 64-bit, POWER little endian          |
|       |                |        |Linux 64-bit, System z, System z9 or       |
|       |                |        |zSeries                                    |
|       |                |        |Windows 32-bit, x86                        |
|       |                |        |Windows 64-bit, x86                        |
|       |                |        |                                           |
|       |                |        |                                           |
|       |                |        |V11.5.9:                                   |
|       |                |        |https://www.ibm.com/support/pages/node/    |
|       |                |        |7071342                                    |
+-------+----------------+--------+-------------------------------------------+

IBM does not disclose key Db2 functionality nor replication steps for a
vulnerability to avoid providing too much information to any potential
malicious attacker. IBM does not want to enable a malicious attacker with
sufficient knowledge to craft an exploit of the vulnerability.

Workarounds and Mitigations

None.

Published Security Vulnerabilities for DB2 for Linux, UNIX, and Windows
including Special Build information

Acknowledgement

Change History

01 Dec 2023: Initial Publication

*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 Security Bulletin.

Disclaimer

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
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF
ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to
address potential vulnerabilities, IBM periodically updates the record of
components contained in our product offerings. As part of that effort, if IBM
identifies previously unidentified packages in a product/service inventory, we
address relevant vulnerabilities regardless of CVE date. Inclusion of an older
CVEID does not demonstrate that the referenced product has been used by IBM
since that date, nor that IBM was aware of a vulnerability as of that date. We
are making clients aware of relevant vulnerabilities as we become aware of
them. "Affected Products and Versions" referenced in IBM Security Bulletins are
intended to be only products and versions that are supported by IBM and have
not passed their end-of-support or warranty date. Thus, failure to reference
unsupported or extended-support products and versions in this Security Bulletin
does not constitute a determination by IBM that they are unaffected by the
vulnerability. Reference to one or more unsupported versions in this Security
Bulletin shall not create an obligation for IBM to provide fixes for any
unsupported or extended-support products or versions.

- --------------------------END INCLUDED TEXT--------------------

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