ESB-2019.0806 - [Win][Linux][HP-UX][Solaris][AIX] IBM Db2: Increased privileges - Existing account 2019-03-13

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0806
         IBM Db2 is vulnerable to privilege escalation via loading
                     libraries from an untrusted path
                               13 March 2019

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

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

Product:           IBM Db2
Publisher:         IBM
Operating System:  AIX
                   Windows
                   HP-UX
                   Linux variants
                   Solaris
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-4094  

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10875860

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

Security Bulletin: IBM Db2 is vulnerable to privilege escalation via loading
libraries from an untrusted path (CVE-2019-4094).

privilege escalation, setuid, CVE-2019-4094

Security Bulletin

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, Windows

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

Reference #: 0875860

Modified date: 12 March 2019

Summary

Db2 binaries load shared libraries from an untrusted path, potentially giving
low privileged local user root access.

Vulnerability Details

CVEID: CVE-2019-4094
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 root by loading a malicious shared library.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
158014 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 are affected.


Remediation/Fixes

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

FIX:

The fix for DB2 V11.1 is in V11.1.4.4 iFix001, available for download from Fix
Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7,
V10.1, V10.5, and V11.1, 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,
V10.1 FP6, V10.5 FP10 and V11.1.4.4. 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        |IT27201    |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                                                        |
|                 |           |           |Windows 32-bit, x86                                                           |
|                 |           |           |Windows 64-bit, x86                                                           |
+-----------------+-----------+-----------+------------------------------------------------------------------------------+
|V10.1            |TBD        |IT27200    |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                                                        |
|                 |           |           |Windows 32-bit, x86                                                           |
|                 |           |           |Windows 64-bit, x86                                                           |
+-----------------+-----------+-----------+------------------------------------------------------------------------------+
|V10.5            |TBD        |IT27191    |Special Build for V10.5 FP10:                                                 |
|                 |           |           |                                                                              |
|                 |           |           |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, POWER(TM) little endian                                            |
|                 |           |           |Linux 64-bit, System z(R), System z9(R) or zSeries(R)                               |
|                 |           |           |Solaris 64-bit, SPARC                                                         |
|                 |           |           |Solaris 64-bit, x86-64                                                        |
|                 |           |           |Windows 32-bit, x86                                                           |
|                 |           |           |Windows 64-bit, x86                                                           |
|                 |           |           |Inspur                                                                        |
+-----------------+-----------+-----------+------------------------------------------------------------------------------+
|V11.1            |11.1.4.4   |IT27199    |https://www-01.ibm.com/support/docview.wss-uid=ibm1087475                     |
|                 |iFix001    |           |                                                                              |
+-----------------+-----------+-----------+------------------------------------------------------------------------------+


Workarounds and Mitigations

None.

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

March 12, 2019: Original Version Published.

*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.

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

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