Security Bulletin
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.
| Product | Version | IBM SDK |
| 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 | 3.1.0, 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:
| Product | Version |
| IBM Data Studio client | 3.2, 4.1.0, 4.1.0.1, 4.1.1 |
| IBM InfoSphere Optim Query Workload Tuner for DB2 for LUW | 3.2, 4.1.0, 4.1.0.1, 4.1.1 |
| IBM InfoSphere Optim Query Workload Tuner for DB2 for z/OS | 3.2, 4.1.0, 4.1.0.1, 4.1.1 |
| InfoSphere Data Architect | 8.5, 9.1, 9.1.1, 9.1.2 |
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.
Get Notified about Future Security Bulletins
References
Change History
22 May 2015 - Initial Security Bulletin
01 July 2015 - Final Security Bulletin
*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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
16 June 2018
UID
swg21722402