Security Bulletin: Vulnerabilities in OpenSSL affect IBM Cognos TM1 including a vulnerabiltiy in the RC4 stream ciphers (CVE-2015-2808, CVE-2014-3569).

Workarounds and Mitigations

IBM recommends the following additional steps:

For Cognos Insight to mitigate the vulnerability in the xulrunner embedded browser:

1.1) Locate Cognos Insight installation directory.
1.2) For all directories matching <installation_directory>\plugins\com.ibm.cognos.isv.xulrunner.win32.*
1.3) Open file <installation_directory>\plugins\com.ibm.cognos.isv.xulrunner.win32.*\xulrunner\greprefs.js with a text editor
1.4) For each RC4 cipher which is set to 'true' change the value to 'false'
e.g.

line:

pref("security.ssl3.rsa_rc4_128_md5", true);

becomes:

pref("security.ssl3.rsa_rc4_128_md5", false);




IBM also highly recommends that if Cognos Insight connects to TM1 Planning Service, the following steps should be performed:


2.1) Start Cognos Configuration

2.2) Navigate to Security/Cryptography/Cognos

2.3) Open the supported cipher suites selection dialog

2.4) 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.

2.5) 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..