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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1251
        Security Bulletin: Multiple vulnerabilities in IBM Java SDK
                affect IBM WebSphere Portal April 2017 CPU
                                17 May 2017

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

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

Product:           IBM WebSphere Portal
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   IBM i
                   Linux variants
                   Solaris
                   Windows
                   z/OS
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-9843 CVE-2016-9842 CVE-2016-9841
                   CVE-2016-9840  

Reference:         ESB-2017.1237
                   ESB-2017.1185
                   ESB-2017.1160
                   ESB-2017.1157

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg22003467

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More support for:

WebSphere Portal

Software version:

6.1, 7.0, 8.0, 8.5, 9.0

Operating system(s):

AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS

Reference #:

2003467

Modified date:

16 May 2017

Summary

There are multiple vulnerabilities in IBM SDK Java Technology Edition that is
shipped with IBM WebSphere Application Server which is shipped with IBM
WebSphere Portal. These issues were disclosed as part of the IBM Java SDK
updates in April 2017.

Vulnerability Details

If you run your own Java code using the IBM Java Runtime delivered with this
product, you should evaluate your code to determine whether the complete list
of vulnerabilities are applicable to your code. For a complete list of
vulnerabilities please refer to the link for "IBM Java SDK Security Bulletin"
located in the References section for more information.

CVEID:

CVE-2016-9840

DESCRIPTION:

zlib is vulnerable to a denial of service, caused by an out-of-bounds pointer
arithmetic in inftrees.c. By persuading a victim to open a specially crafted
document, a remote attacker could exploit this vulnerability to cause a
denial of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/120508

for the current score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:

CVE-2016-9841

DESCRIPTION:

zlib is vulnerable to a denial of service, caused by an out-of-bounds pointer
arithmetic in inftrees.c. By persuading a victim to open a specially crafted
document, a remote attacker could exploit this vulnerability to cause a
denial of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/120509

for the current score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:

CVE-2016-9842

DESCRIPTION:

zlib is vulnerable to a denial of service, caused by an undefined left shift
of negative number. By persuading a victim to open a specially crafted
document, a remote attacker could exploit this vulnerability to cause a
denial of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/120510

for the current score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:

CVE-2016-9843

DESCRIPTION:

zlib is vulnerable to a denial of service, caused by a big-endian out-of-
bounds pointer. By persuading a victim to open a specially crafted document,
a remote attacker could exploit this vulnerability to cause a denial of
service.

CVSS Base Score: 3.3

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/120511

for the current score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM WebSphere Portal 9.0
IBM WebSphere Portal 8.5
IBM WebSphere Portal 8.0
IBM WebSphere Portal 7.0
IBM WebSphere Portal 6.1

For unsupported versions IBM recommends upgrading to a fixed, supported
version of the product.

Remediation/Fixes

Upgrade the SDK per WebSphere Application Server "Security Bulletin: 
WebSphere Application Server update of IBM SDK Java Technology Edition".

For V9.0
Upgrade the SDK.

For V8.5
Upgrade the SDK.

For V8.0
Upgrade the SDK.

For V7.0
Upgrade the SDK.

For V6.1
Upgrade the SDK.

Workarounds and Mitigations

None

Important note

IBM strongly suggests that all System z customers be subscribed to the System
z Security Portal to receive the latest critical System z security and
integrity service. If you are not subscribed, see the instructions on the
System z Security web site. Security and integrity APARs and associated 
fixes will be posted to this portal. IBM suggests reviewing the CVSS 
scores and applying all security or integrity fixes as soon as possible to 
minimize any potential risk.

References

Complete CVSS v3 Guide

On-line Calculator v3

IBM Java SDK Security Bulletin

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Change History

16 May 2017: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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