ESB-2018.1569 - [Linux][HP-UX][Solaris][AIX] IBM DB2: Overwrite arbitrary files - Existing account 2018-05-23

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1569
  Security Bulletin: IBM(R) Db2(R) is affected by multiple file overwrite
              vulnerabilities (CVE-2018-1450, CVE-2018-1449,
                       CVE-2018-1451, CVE-2018-1452)
                                23 May 2018

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

Product:           IBM DB2
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
Impact/Access:     Overwrite Arbitrary Files -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1452 CVE-2018-1451 CVE-2018-1450
                   CVE-2018-1449  

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg22016181

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

Security Bulletin: IBM(R) Db2(R) is affected by multiple file overwrite
vulnerabilities (CVE-2018-1450, CVE-2018-1449, CVE-2018-1451, CVE-2018-1452)

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 #: 2016181

Modified date: 22 May 2018

Summary

Db2 is affected by multiple file overwrite vulnerabilities. An unprivileged
user can overwrite arbitrary
files by creating a symlink that points to a file owned by the Db2 instance
account.

Vulnerability Details

CVEID: CVE-2018-1450
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server)
contains a vulnerability that could allow a local user to overwrite arbitrary
files owned by the DB2 instance owner.
CVSS Base Score: 7.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
140045 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)

CVEID: CVE-2018-1449
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server)
contains a vulnerability that could allow a local user to overwrite arbitrary
files owned by the DB2 instance owner.
CVSS Base Score: 7.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
140044 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)

CVEID: CVE-2018-1451
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server)
contains a vulnerability that could allow a local user to overwrite arbitrary
files owned by the DB2 instance owner.
CVSS Base Score: 7.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
140046 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)

CVEID: CVE-2018-1452
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server)
contains a vulnerability that could allow a local user to overwrite arbitrary
files owned by the DB2 instance owner.
CVSS Base Score: 7.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
140047 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/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.

FIX:
The fix for DB2 V11.1 is in V11.1.3.3 iFix001, available for download from Fix
Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7,
V10.1, and V10.5, 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: DB2 V9.7 FP11, V10.1
FP6, and V10.5 FP9. 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       |IT24217   |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       |IT24216   |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          |TBD       |IT24215   |Special Build for V10.5 FP9:                                        |
|               |          |          |                                                                    |
|               |          |          |    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                                          |
|               |          |          |    Inspur                                                          |
+---------------+----------+----------+--------------------------------------------------------------------+
|V11.1.3.3      |iFix001   |IT24171   |http://www-01.ibm.com/support/docview.wssuid=swg24044872           |
+---------------+----------+----------+--------------------------------------------------------------------+

Workarounds and Mitigations

None.

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References

Complete CVSS v3 Guide
On-line Calculator v3

Related information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerabilities were reported to IBM by Rich Mirch.

Change History

May 22, 2018: 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.

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