Security Bulletin: A vulnerability in IBM Java affects IBM ILOG CPLEX Optimization Studio (CVE-2020-27221)

Summary

There is a vulnerability in IBM® Java™ versions 7 & 8 used by IBM CPLEX Optimization Studio. IBM CPLEX Optimization Studio has addressed the applicable CVE.

Vulnerability Details

CVEID:CVE-2020-27221
**DESCRIPTION:**Eclipse OpenJ9 is vulnerable to a stack-based buffer overflow when the virtual machine or JNI natives are converting from UTF-8 characters to platform encoding. By sending an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 9.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/195353 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM ILOG CPLEX Optimization Studio (COS)| 12.10
IBM ILOG CPLEX Optimization Studio (COS)| 12.9
IBM ILOG CPLEX Optimization Studio (COS)| 12.8
IBM ILOG CPLEX Optimization Studio (COS)| 12.7.1
IBM ILOG CPLEX Optimization Studio (COS)| 12.7

Remediation/Fixes

The recommended solution is to download and install the appropriate version of IBM JRE as soon as practicable.
Before installing a newer version of IBM JRE, please ensure that you:

• Close any open programs that you may have running;
• Rename the initial directory of the IBM JRE (for example: with a .old at the end),
• Download and install the appropriate IBM JRE version.

IBM ILOG CPLEX Optimization Studio

IBM Java Version 7 Service Refresh 10 Fix Pack 80 and subsequent releases

IBM Java Version 8 Service Refresh 6 Fix Pack 25 and subsequent releases

You must verify that applying this fix does not cause any compatibility issues.
Here are the detailed instructions for updating IBM JRE.

For Mac OS, HP-UX and Solaris, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

None