ESB-2018.2033.2 - UPDATE [Linux][HP-UX][Solaris][AIX] IBM Db2: Increased privileges - Existing account 2018-08-08

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.2033.2
                        Security update for IBM Db2
                               8 August 2018

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

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

Product:           IBM Db2
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1451 CVE-2018-1450 CVE-2018-1449

Reference:         ESB-2018.1569

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg22016505

Revision History:  August  8 2018: Updated 11.1 version with a link to 
				   11.1.3.3 iFix002 image
                   July   12 2018: Initial Release

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

Security Bulletin: Privilege escalation in IBM(R) Db2(R) via loading libraries from
untrusted path (CVE-2018-1487).

Document information
More support for: DB2 for Linux, UNIX and Windows
Software version: 9.7, 10.1, 10.5, 11.1

Operating system(s): AIX, HP-UX, Linux, Solaris

Software edition: Advanced Enterprise Server, Advanced Workgroup Server, Enterprise Server, Express, Express-C, Personal, Workgroup Server

Reference #: 2016505

Modified date: 07 August 2018

Security Bulletin


Summary

Db2 loads shared libraries from an untrusted path potentially giving low
privilege user full access to the DB2 instance account by loading a malicious
shared library. All instance owner executables that run with elevated
privileges (setuid) are affected. Root setuid executables are not affected.

The implication is that if the customer has implemented their own applications
which run with elevated privileges (setuid) those are affected as well, and it
is up to the customer to ensure that the DB2INSTANCE environment variable is
correctly set to the Db2 instance owner, and not modified by a malicious user.

Vulnerability Details

CVEID: CVE-2018-1487
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server)
binaries load shared libraries from an untrusted path potentially giving low
privilege user full access to the DB2 instance account by loading a malicious
shared library.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
140972 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

All fix pack levels of IBM Db2 V9.7, V10.1, V10.5, and V11.1 editions on all
platforms except Windows are affected.

Remediation/Fixes

The recommended solution is to apply the appropriate fix for this vulnerability
and, in the case that the customer is implementing their own setuid
applications, to ensure the DB2INSTANCE environment variable is correct and not
modified by a malicious user.

FIX:

The fix for DB2 release V10.5 is in V10.5 FP10 and V11.1 is in V11.1.3.3
iFix002, which are available for download from Fix Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7 and
V10.1 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: DB2 V9.7 FP11 and V10.1 FP6. They can
be applied to any affected fixpack level of the appropriate release to
remediate this vulnerability.


+---------------+----------+----------+---------------------------------------------------------------------+
|Release        |Fixed in  |APAR      |Download URL                                                         |
|               |fix pack  |          |                                                                     |
+---------------+----------+----------+---------------------------------------------------------------------+
|V9.7           |TBD       |IT24477   |Special Build for V9.7 FP11:                                         |
|               |          |          |                                                                     |
|               |          |          |AIX 64-bit                                                           |
|               |          |          |HP-UX 64-bit                                                         |
|               |          |          |Linux 32-bit, x86-32                                                 |
|               |          |          |Linux 64-bit, x86-64                                                 |
|               |          |          |Linux 64-bit, POWER(TM) big endian                                      |
|               |          |          |Linux 64-bit, System z(R), System z9(R) or zSeries(R)                      |
|               |          |          |Solaris 64-bit, SPARC                                                |
|               |          |          |Solaris 64-bit, x86-64                                               |
+---------------+----------+----------+---------------------------------------------------------------------+
|V10.1          |TBD       |IT24476   |Special Build for V10.1 FP6:                                         |
|               |          |          |                                                                     |
|               |          |          |AIX 64-bit                                                           |
|               |          |          |HP-UX 64-bit                                                         |
|               |          |          |Linux 32-bit, x86-32                                                 |
|               |          |          |Linux 64-bit, x86-64                                                 |
|               |          |          |Linux 64-bit, POWER(TM) big endian                                      |
|               |          |          |Linux 64-bit, System z(R), System z9(R) or zSeries(R)                      |
|               |          |          |Solaris 64-bit, SPARC                                                |
|               |          |          |Solaris 64-bit, x86-64                                               |
+---------------+----------+----------+---------------------------------------------------------------------+
|V10.5          |FP10      |IT24475   |https://www-01.ibm.com/support/docview.wss-uid=swg24045012           |
+---------------+----------+----------+---------------------------------------------------------------------+
|V11.1.3.3      |iFix002   |IT24474   |https://www-01.ibm.com/support/docview.wss-uid=ibm10720009           |
+---------------+----------+----------+---------------------------------------------------------------------+

Workarounds and Mitigations

None.

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alerts like this.

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerability was reported to IBM by Rich Mirch.

Change History

July 6, 2018: Original Version Published.
July 11, 2018: Updated 10.5 version with a link to 10.5 FP10 image.
August 7, 2018: Updated 11.1 version with a link to 11.1.3.3 iFix002 image.

*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.

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