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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.0492
         Security Bulletin: Mutiple vulnerabilities in zlib affect
                    IBM ILOG CPLEX Optimization Studio
                             23 February 2017

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

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

Product:           IBM ILOG CPLEX Optimization Studio
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   OS X
                   Solaris
                   Windows
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-9843 CVE-2016-9842 CVE-2016-9841
                   CVE-2016-9840  

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21997946

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Security Bulletin: Mutiple vulnerabilities in zlib affect IBM ILOG CPLEX 
Optimization Studio

Security Bulletin

Document information

More support for: IBM ILOG CPLEX Optimization Studio

Software version: 12.2, 12.2.0.1, 12.3, 12.4, 12.4.0.1, 12.5, 12.5.0.1, 
12.5.1, 12.6, 12.6.0.1, 12.6.1, 12.6.2, 12.6.3, 12.7.0

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

Software edition: All Editions

Reference #: 1997946

Modified date: 22 February 2017

Summary

The gz feature, provided by the open source zlib, is used to decompress files
automatically. A denial of service may be caused by four potential 
vulnerabilities.

Vulnerability Details

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 CPLEX Optimization Studio (COS) v12.7 and earlier

IBM CPLEX Enterprise Server (CES) v12.7 and earlier

Remediation/Fixes

None

Workarounds and Mitigations

The workaround is to stop using the gz feature. You will need to decompress 
model files before trying to solve them with IBM ILOG CPLEX Optimization 
Studio. The gz feature is optional and not required for solving mathematical 
problems.

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Subscribe to My Notifications to be notified of important product support 
alerts like this.

References

Complete CVSS v3 Guide

On-line Calculator v3

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Change History

22 February 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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