Security Bulletin
Summary
The RC4 "Bar Mitzvah" Attack for SSL/TLS affects Tivoli Storage Manager Operations Center
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
Tivoli Storage Manager Operations Center v6.4 and v7.1.
Remediation/Fixes
|
TSM OC Release | Remediation/First Fix |
| 6.4 | 6.4.2.100 - ALL Operating Systems (see NOTE below) |
| 7.1 | 7.1.1.100 - ALL Operating Systems |
NOTE:
For Operations Center 6.4, you must first uninstall Operations Center, delete the cached files, and then reinstall Operations Center using the following instructions:
- Download the Remediation Fix for Operations Center 6.4.2.100 (see above)
- Open IBM Installation Manager, click Uninstall, and follow the instructions in the wizard.
- Close IBM Installation Manager.
- Copy the following file to a different directory: <install dir>/tsm/ui/Liberty/usr/servers
/guiServer/serverConnection.properties - Delete the following directory: <install dir>/tsm/ui
- Open IBM Installation Manager, click install, and follow the instructions in the wizard.
- Close IBM Installation Manager.
- Copy the serverConnection.properties file from its temporary location to the following directory:
<install dir>/tsm/ui/Liberty/usr/servers
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
Direct the GUI's Liberty profile web server to disable use of the SSLv3 and older protocols. This is done by editing the web server configuration to set the minimum protocol to be Transport Layer Security (TLS) 1.0.
Use the following procedure to edit the web server configuration:
For TSM Operations Center v6.4.2 and v7.1.0
- Locate the server.xml file in its current directory:
Windows: C:\Tivoli\TSM\ui\Liberty\usr\servers\guiServer
AIX / Linux: /opt/tivoli/tsm/ui/Liberty/usr/servers/guiServer - Edit the server.xml file with a text editor as follows:
a) Locate the existing line that starts with <keyStore id="defaultKeyStore" ...
b) Insert the following 2 lines below it:
<ssl id="ocSSLConfig" sslProtocol="TLS" keyStoreRef="defaultKeyStore"/>
<sslDefault sslRef="ocSSLConfig"/>
c) Save the changes to server.xml - In same directory as server.xml, save the jvm.options file that is attached to this bulletin and located after the Disclaimer.
- Restart the web server as follows:
- Windows:
a. Click Start > Control Panel > Administrative Tools > Services
b. Right-click Tivoli Storage Manager Operations Center Service and click Restart
- AIX / Linux: Issue the following command as root:
For TSM Operations Center v7.1.1
- Locate the bootstrap.properties file in its current directory:
Windows: C:\Tivoli\TSM\ui\Liberty\usr\servers\guiServer
AIX / Linux: /opt/tivoli/tsm/ui/Liberty/usr/servers/guiServer - Edit the value of tsm.https.sslRef to SP800131atransition and save changes
- In same directory as bootstrap.properties, save the jvm.options file that is attached to this bulletin and located after the Disclaimer.
- Restart the web server as follows:
- Windows:
a. Click Start > Control Panel > Administrative Tools > Services
b. Right-click Tivoli Storage Manager Operations Center Service and click Restart
- AIX / Linux: Issue the following command as root:
The GUI is now operational with SSLv3 and older protocols disabled.
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
Acknowledgement
None
Change History
06 May 2015 Original Version Published.
19 May 2015 Updated Remediation instructions for Operations Center 6.4.
*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
swg21883731