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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.0961
  Security Bulletin: Vulnerability in RC4 stream cipher affects Rational
       Application Developer for WebSphere Software (CVE-2015-2808)
                               14 April 2015

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Rational Application Developer for WebSphere Software
Publisher:         IBM
Operating System:  Linux variants
                   OS X
                   Windows
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.0960
                   ESB-2015.0958
                   ESB-2015.0956
                   ESB-2015.0955
                   ESB-2015.0954
                   ESB-2015.0953
                   ESB-2015.0950.2
                   ESB-2015.0949.2
                   ESB-2015.0948.2
                   ESB-2015.0947.2
                   ESB-2015.0946.2
                   ESB-2015.0944.2

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21719164

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Security Bulletin: Vulnerability in RC4 stream cipher affects Rational 
Application Developer for WebSphere Software (CVE-2015-2808)

Security Bulletin

Document information

More support for:

Rational Application Developer for WebSphere Software

General Information

Software version:

8.0, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.4.1, 8.0.4.2, 8.0.4.3, 8.5, 8.5.1, 8.5.5,
8.5.5.1, 9.0, 9.0.1, 9.0.1.1, 9.1, 9.1.0.1, 9.1.1

Operating system(s):

Linux, OS X, Windows

Reference #:

1719164

Modified date:

2015-04-10

Summary

The RC4 Bar Mitzvah Attack for SSL/TLS affects Rational Application Developer
for WebSphere Software.

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 Application Developer 9.1.1 and earlier

Remediation/Fixes

Update the Java Development Kit of the product to address this vulnerability:

Product 			VRMF 			APAR 		Remediation/First Fix

Rational Application Developer 	7.5 through 9.1.1	PI38888		For WebSphere Application Server, see Security Bulletin: Vulnerability in
									RC4 stream cipher affects WebSphere Application Server (CVE-2015-2808)

Rational Agent Controller 	7.0 through to 9.1.1 	PI38888		None

Rational Build Utility 		7.5 through to 9.1.1 	PI38888		None

Workarounds and Mitigations

If you are using any of the following products:

    Rational Agent Controller versions 8.3.5, 8.3.6, 9.0, 9.1

    Rational Application Developer for WebSphere Software versions 8.5, 9.0, 
    and 9.1

    Rational Build Utility versions 8.5, 9.0, and 9.1

then the following steps can be used to remove RC4 from the list of available
algorithms:

1. Ensure the product is not running.

2. Locate the java.security file used by the product:

    Rational Agent Controller: install folder/AgentController/jre/lib/security/java.security

    Rational Application Developer for WebSphere Software: install folder/jdk/jre/lib/security/java.security

    Rational Build Utility: install folder/jdk/jre/lib/security/java.security

3. Edit the java.security file with a text editor and locate the line:

    jdk.tls.disabledAlgorithms=SSLv3

4. Add RC4 to the list of disabled algorithms; For example:

    jdk.tls.disabledAlgorithms=SSLv3, RC4

5. Save the file and restart the product.

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.

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support 
alerts like this.

References

Complete CVSS Guide

On-line Calculator V2

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

* 10 April 2015: Original copy 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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