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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.0992
 Security Bulletin: Security Bulletin: Vulnerability in RC4 stream cipher
            affects IBM Cognos Metrics Manager (CVE-2015-2808)
                               16 April 2015

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

Product:           IBM Cognos Metrics Manager
Publisher:         IBM
Operating System:  AIX
                   HP Itanium
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.0990
                   ESB-2015.0988
                   ESB-2015.0987
                   ESB-2015.0986
                   ESB-2015.0969
                   ESB-2015.0967
                   ESB-2015.0966
                   ESB-2015.0965
                   ESB-2015.0964
                   ESB-2015.0963
                   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=swg21720187

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Security Bulletin: Security Bulletin: Vulnerability in RC4 stream cipher 
affects IBM Cognos Metrics Manager (CVE-2015-2808)

Security Bulletin

Document information

More support for:

Cognos Business Intelligence

Metrics Studio

Software version:

10.1, 10.1.1, 10.2, 10.2.2

Operating system(s):

AIX, HP Itanium, HP-UX, Linux, Solaris, Windows

Reference #:

1720187

Modified date:

2015-04-10

Summary

The RC4 Bar Mitzvah Attack for SSL/TLS affects IBM Cognos Metrics Manager.

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

    IBM Cognos Metrics Manager 10.2.2

    IBM Cognos Metrics Manager 10.2

    IBM Cognos Metrics Manager 10.1.1

    IBM Cognos Metrics Manager 10.1

Remediation/Fixes

None

Workarounds and Mitigations

The RC4 cipher suites must be disabled using Cognos Configuration by 
performing the following actions:

1) Start Cognos Configuration

2) Navigate to Security/Cryptography/Cognos

3) Open the supported cipher suites selection dialog

4) Select all cipher suites that have RC4 in the the name and remove them from
the Current Values List. Select OK to save the new list.

5) Save and restart your service using Cognos Configuration.

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

Security Bulletin: Vulnerability in RC4 stream cipher affects IBM Cognos 
Business Intelligence Server

Change History

10 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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