Security Bulletin
Summary
The RC4 “Bar Mitzvah” Attack for SSL/TLS affects IBM OS Images for Red Hat Linux Systems and AIX.
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 OS Image for Red Hat Linux Systems 3.0.0.0 and earlier.
IBM OS Image for AIX Systems 2.1.1.0 and earlier.
Remediation/Fixes
Virtual machines deployed from IBM PureApplication Systems are affected. This includes RedHat Linux and AIX-based deployments. The solution is to apply the following IBM PureApplication System fix to the deployed virtual machines.
Java Update for Linux
http://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=PureSystems&product=ibm/WebSphere/PureApplication+System&release=All&platform=All&function=fixId&fixids=+Java_Update_Linux_2++&includeSupersedes=0
Java Update for AIX
http://www-933.ibm.com/support/fixcentral/swg/selectFixes?parent=PureSystems&product=ibm/WebSphere/PureApplication+System&release=All&platform=All&function=fixId&fixids=+Java_Update_AIX_2++&includeSupersedes=0
1. Import the fix into the Emergency Fix catalogue.
2. For deployed instances, apply this emergency fix on the VM.
3. Restart the deployed instance after the fix is applied.
Refer to the following technical note for additional installation information: "Steps to install the emergency fix to address the vulnerability in the RC4 stream cipher that affects IBM OS Images for Red Hat Linux Systems and AIX."
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
None
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References
Acknowledgement
None
Change History
4 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
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:
15 June 2018
UID
swg21883879