Security Bulletin: Vulnerability in RC4 stream cipher affects Rational Synergy (CVE-2015-2808)

Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects Rational Synergy.

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

· Rational Synergy release 7.2.1.3 ifix01 or earlier.
· Rational Synergy release 7.2.0.7 or earlier.
· Rational Synergy release 7.1.0.7.005 or earlier.

Remediation/Fixes

Product

| VRMF| APAR| Remediation/First Fix
—|—|—|—
Rational Synergy| 7.1.x, 7.2.x and 7.2.1.x| N/A| Replace the JRE used in Rational Synergy.

Steps to download and replace JRE in Rational Synergy:
1. Open the list of Synergy downloads on Fix Central

2. Select the SDK and Readme for Rational Synergy which applied to your release as follows:

Note: The fix will use the following naming convention: <V.R.M.F>-Rational-RATISYNE-JavaSE-SDK-6.0.16.3-**<platform>****

Where<V.R.M.F> = release &<platform> = operating system**
o Rational Synergy 7.2.1 (uses 7.2.1.3 release designation)

Example: 7.2.1.3-Rational-RATISYNE-JavaSE-SDK-6.0.16.3-Linux

o Rational Synergy 7.2.0 (uses 7.2.0.6 release designation)

Example: 7.2.0.6-Rational-RATISYNE-JavaSE-SDK-6.0.16.3-Windows

o Rational Synergy 7.1 (uses 7.1.0.7 release designation)

Example: **7.1.0.7-Rational-RATISYNE-JavaSE-SDK-6.0.16.3-AIX **Example: 7.1.0.7-Rational-RATISYNE-JavaSE-SDK-6.0.16.3-Solaris

3. Follow the steps in the Install instructions to replace the JRE.

Follow the steps in the HPUX_Install Instructions to replace the JRE if your Synergy Platform is on HPUX

You should verify applying this fix does not cause any compatibility issues. The fix disables RC4 stream cipher by default. If you change this setting you 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.

To verify if Synergy has JRE version to address this security vulnerability:-
Open a command prompt
Unix:-
Go to $CCM_HOME/jre/bin folder
Execute ./java -version

Windows:-
Go to %CCM_HOME%\jre\bin folder
Execute java -version

If in the output version is greater than SR16 FP3 or if it is SR16 FP3+IV70681+IV71888, It implies the run area has jre version that addressed this security vulnerability.

Example:-
java version “1.6.0”
Java™ SE Runtime Environment (build pwi3260sr16fp3ifix-20150407_01(SR16 FP3+IV70681+IV71888))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Windows 7 x86-32 jvmwi3260sr16-201412

Workarounds and Mitigations

None