Security Bulletin: Vulnerability in RC4 stream cipher affects IBM Data Server Manager (CVE-2015-2808)

Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects IBM Data Server Manager.

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 Server Manager Base Edition V1.1.0.0

IBM Data Server Manager Enterprise Edition V1.1.0.0

Remediation/Fixes

V1.1.0.0

| Fix Central (Interim Fix 1715) or see Workarounds and Mitigation below.
—|—

Workarounds and Mitigations

Disable the RC4 cipher suite by adding “RC4” to the list of disabled algorithms defined by the jdk.tls.disabledAlgorithms security property in java.security file.

Edit the java.security file that is located in the IBM Data Server Manager installation directory:
/java/jre/lib/security/java.security

Add the following line and save the file:
jdk.tls.disabledAlgorithms=RC4

If the jdk.tls.disabledAlgorithms property was already enabled (without a “#” character at the beginning of the line), i.e.:
jdk.tls.disabledAlgorithms=SSLv3

then append the text “, RC4” to the end of the line and save the file.
jdk.tls.disabledAlgorithms=SSLv3``**, RC4**

Restart the DSM Web Console server for this change to take effect.

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.