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AUSCERT External Security Bulletin Redistribution
ESB-2015.1148
Security Bulletin: Vulnerability in RC4 stream cipher
affects Rational Synergy (CVE-2015-2808)
27 April 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Rational Synergy
Publisher: IBM
Operating System: AIX
Linux variants
Solaris
Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2808
Reference: ESB-2015.1143
ESB-2015.1141
ESB-2015.1140
ESB-2015.1130
ESB-2015.1128
ESB-2015.1127
ESB-2015.1126
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21702801
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Security Bulletin: Vulnerability in RC4 stream cipher affects Rational Synergy
(CVE-2015-2808)
Document information
More support for:
Rational Synergy
Software version:
7.1, 7.2, 7.2.1
Operating system(s):
AIX, Linux, Solaris, Windows
Reference #:
1702801
Modified date:
2015-04-24
Security Bulletin
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
Rational Synergy
VRMF
7.1.x, 7.2.x and 7.2.1.x
APAR
N/A
Remediation/First Fix
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(TM) 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
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References
Complete CVSS Guide
On-line Calculator V2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
* 17th April 2015: Original version published
*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
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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