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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1150
  Security Bulletin: Vulnerability in RC4 stream cipher affects WebSphere
               DataPower XC10 Appliance V2.1 (CVE-2015-2808)
                               28 April 2015

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

Product:           IBM WebSphere XC10 DataPower Appliance
Publisher:         IBM
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.1148
                   ESB-2015.1147
                   ESB-2015.1143
                   ESB-2015.1141
                   ESB-2015.1140
                   ESB-2015.1130

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21883666

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Security Bulletin: Vulnerability in RC4 stream cipher affects WebSphere 
DataPower XC10 Appliance V2.1 (CVE-2015-2808)

Document information

More support for:

WebSphere DataPower XC10 Appliance

Software version:

2.1

Operating system(s):

Firmware

Reference #:

1883666

Modified date:

2015-04-24

Security Bulletin

Summary

The RC4 Bar Mitzvah Attack for SSL/TLS affects WebSphere DataPower XC10 
Appliance Version 2.1. WebSphere DataPower XC10 Appliance Version 2.5 is not 
affected.

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

WebSphere DataPower XC10 Appliance V2.1

Remediation/Fixes

The only remediation is to apply the following fixes:

Product   

WebSphere DataPower XC10 Appliance 

VRMF

2.1

APAR

IT08240 

Remediation/First Fix

http://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&product=ibm/WebSphere/WebSphere+DataPower+XC10+Appliance&release=2.1.0.3&platform=All&function=all

Verify that 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.

Workarounds and Mitigations

For WebSphere DataPower XC10 Appliance Version 2.1 will need to apply the 
appropriate fix. This will disable the RC4 algorithm used on the appliance.

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

Change History

24 April 2014

*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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