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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1076
  Security Bulletin: Vulnerability in RC4 stream cipher affects WebSphere
              Service Registry and Repository (CVE-2015-2808)
                               20 April 2015

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

Product:           IBM WebSphere Service Registry and Repository
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
                   z/OS
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.0962
                   ESB-2015.0961
                   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=swg21715900

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Security Bulletin: Vulnerability in RC4 stream cipher affects WebSphere 
Service Registry and Repository (CVE-2015-2808)

Security Bulletin

Document information

More support for:

WebSphere Service Registry and Repository

Security

Software version:

7.0, 7.5, 8.0, 8.5

Operating system(s):

AIX, HP-UX, Linux, Solaris, Windows, z/OS

Reference #:

1715900

Modified date:

2015-04-17

Summary

The RC4 Bar Mitzvah Attack for SSL/TLS affects WebSphere Service Registry and
Repository.

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 Service Registry and Repository versions 7.0, 7.5, 8.0, and 8.5.

Remediation/Fixes

Users are already protected from this issue if they:

Have already applied WebSphere Application Server Interim Fix PI36563 to 
mitigate against the "FREAK: Factoring Attack on RSA-EXPORT keys". This fix 
removes RC4 from the default cipher lists.

AND are not using a custom WebSphere Application Server cipher list that 
includes the RC4 cipher

If WebSphere Application Server Interim Fix PI36563 has not yet been applied,
users should follow the advice contained in the following linked WebSphere 
Application Server security bulletin: 
http://www-01.ibm.com/support/docview.wss?uid=swg21698613.

If a custom cipher list is being used, users should verify that RC4 is not one
of the listed ciphers, and remove it if it is.

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.

Important note: IBM strongly suggests that all System z customers subscribe to
the System z Security Portal to receive the latest critical System z security
and integrity service. If you are not subscribed, see the instructions on the
System z Security web site. Security and integrity APARs and associated fixes
will be posted to this portal. IBM suggests reviewing the CVSS scores and 
applying all security or integrity fixes as soon as possible to minimize any 
potential risk.

Get Notified about Future Security Bulletins

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

Important note

IBM strongly suggests that all System z customers be subscribed to the System
z Security Portal to receive the latest critical System z security and 
integrity service. If you are not subscribed, see the instructions on the 
System z Security web site. Security and integrity APARs and associated fixes
will be posted to this portal. IBM suggests reviewing the CVSS scores and 
applying all security or integrity fixes as soon as possible to minimize any 
potential risk.

References

Complete CVSS Guide

On-line Calculator V2

Related information IBM Secure Engineering Web Portal IBM Product Security 
Incident Response Blog Change History

17 April 2014: 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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