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

Security Bulletin


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 ILOG CPLEX Optimization Studio (COS) v12.7 and earlier
IBM ILOG CPLEX Enterprise Server (CES) v12.7 and earlier

Remediation/Fixes

Please upgrade to IBM ILOG CPLEX Optimization Studio v12.7.1 in which the problem is fixed.

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.

Get Notified about Future Security Bulletins

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
7 April 2017: Modification Pack announcement (Zlib issue fixed)

*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.

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: 10 April 2017