Security Bulletin: Vulnerability in RC4 stream cipher affects various Optim data server tools desktop products (CVE-2015-2808)

Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects various Optim data server tools desktop products.

Vulnerability Details

CVEID: CVE-2015-2808 DESCRIPTION: The RC4 algorithm, as used in the TLS protocol and SSL protocol, could allow a remote attacker to obtain sensitive information. An attacker could exploit this vulnerability to remotely expose account credentials without requiring an active man-in-the-middle session. Successful exploitation could allow an attacker to retrieve credit card data or other sensitive information. This vulnerability is commonly referred to as “Bar Mitzvah Attack”.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/101851 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Affected Products and Versions

IBM Data Studio client 4.1.1 and earlier

IBM InfoSphere Optim Query Workload Tuner for DB2 for LUW 4.1.1 and earlier

IBM InfoSphere Optim Query Workload Tuner for DB2 for z/OS 4.1.1 and earlier

InfoSphere Data Architect 9.1.2 and earlier

Remediation/Fixes

IBM recommends that you fix this vulnerability by upgrading affected versions of the Optim data server tools to the following code level or higher:

IBM Data Studio client 4.1.1 APAR 4
download 4.1.1 APAR 4

IBM InfoSphere Optim Query Workload Tuner for DB2 for LUW 4.1.1 APAR 4
download 4.1.1 APAR 4

IBM InfoSphere Optim Query Workload Tuner for DB2 for z/OS 4.1.1 APAR 4
download 4.1.1 APAR 4

IBM also recommends updating to the latest version of the IBM SDK, Java™ Technology Edition that is installed with the client.and that contains the latest security patches.

IBM InfoSphere Optim Query Workload Tuner for DB2 for LUW

IBM InfoSphere Optim Query Workload Tuner for DB2 for z/OS

| 3.1.0, 3.1.1| Java 6 Windows 32-bit

Java 6 Windows 64-bit

Java 6 Linux 32-bit

Java 6 Linux 64-bit
IBM Data Studio client

IBM InfoSphere Optim Query Workload Tuner for DB2 for LUW

IBM InfoSphere Optim Query Workload Tuner for DB2 for z/OS

| 3.2, 4.1.0, 4.1.0.1, 4.1.1| Java 7 Windows 64-bit
InfoSphere Data Architect| 7.6, 8.1| Java 6 Windows 32-bit

Java 6 Windows 64-bit

Java 6 Linux 32-bit

Java 6 Linux 64-bit
InfoSphere Data Architect| 8.5, 9.1, 9.1.1, 9.1.2| Java 7 Windows 64-bit

Detailed instructions for updating the IBM SDK, Java™ Technology Edition are provided in the tech-note “Updating the IBM SDK, Java Technology Edition for Optim Data Server Tools Desktop Products”.

Workarounds and Mitigations

The following mitigation applies to:

To disable the RC4 stream cipher in the JVM environment of the product, modify the** java.security** file.

The java.security file is located in the security folder relative to the product install directory (for example: C:\Program Files\IBM\DS4.1.1\jdk\jre\lib\security\java.security).

Open the file and add the following property at the end of the file:

jdk.tls.disabledAlgorithms=RC4

If there is an existing entry already, append to it using a comma to separate each algorithm. For example:

**jdk.tls.disabledAlgorithms=**SSLv3,RC4

Note: editing the java.security file may require administrator privileges.

Restart the product to pick up the security configuration updates.

You should verify applying this configuration change does not cause any compatibility issues. Not disabling the RC4 stream cipher will expose yourself to the attack described above. IBM recommends that you review your entire environment to identify other areas where you have enabled the RC4 stream cipher and take appropriate mitigation and remediation actions.

For earlier versions, IBM recommends upgrading to the latest supported version of the product.