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Security Bulletin: Vulnerability in RC4 stream cipher affects IBM Netcool/Reporter (CVE-2015-2808)

Security Bulletin


Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects IBM Netcool/Reporter.

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 Netcool/Reporter 2.2

Remediation/Fixes

You must upgrade your current version of the Netcool/Reporter provided Apache 2.2.22 to include the updated OpenSSL (1.0.1m) which is available from Fix Central via Tivoli Netcool Reporter 2.2.0.9 IF0005, 2.2.0.9-TIV-NCReporter-IF0005.

You should verify applying this fix does not cause any compatibility issues. The fix disables RC4 stream cipher by default. If you change the default setting after applying the fix, 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

To disable RC4 in the supplied Apache HTTPD server, in the http-ssl.conf file, located under $APACHE_HOME/conf/ or %APACHE_HOME%\conf\, locate the following line:

SSLCipherSuite ECDHE-RSA-AES128-SHA256:AES128-GCM-SHA256:HIGH:!MD5:!aNULL:!EDH

...and add the following text to the end of the existing text:

:!RC4

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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References

Off

Change History

16 April 2015 - Original Version Published
27 May 2015: Updated with Remediation/Fixes

*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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
17 June 2018

UID

swg21882825