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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1244
           Security Bulletin: Vulnerability in RC4 stream cipher
                affects IBM Cognos Planning (CVE-2015-2808)
                                7 May 2015

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

Product:           IBM Cognos Planning
Publisher:         IBM
Operating System:  Windows
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.1238
                   ESB-2015.1237
                   ESB-2015.1233
                   ESB-2015.1231
                   ESB-2015.1228
                   ESB-2015.1221
                   ESB-2015.1218
                   ESB-2015.1217
                   ESB-2015.1216

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21902576

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

Document information

More support for:

Cognos Planning

Software version:

10.1, 10.1.1

Operating system(s):

Windows

Reference #:

1902576

Modified date:

2015-05-06

Security Bulletin

Summary

The RC4 Bar Mitzvah Attack for SSL/TLS affects IBM Cognos Planning

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 Planning 10.1

IBM Cognos Planning 10.1.1

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.

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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

6 May 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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