IBM Support

Security Bulletin: Vulnerability in RC4 stream cipher affects Rational Developer for i, Rational Developer for AIX and Linux, and Rational Developer for Power Systems Software (CVE-2015-2808)

Security Bulletin


Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects Rational Developer for i, Rational Developer for AIX and Linux, and Rational Developer for Power Systems Software.

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

Product Name

Versions Affected
Rational Developer for Power Systems Software8.5, 8.5.1
Rational Developer for i9.0, 9.0.0.1, 9.0.1, 9.1, 9.1.1, 9.1.1.1
Rational Developer for AIX and Linux, AIX COBOL Edition9.0, 9.0.0.1, 9.0.1, 9.1, 9.1.1
Rational Developer for AIX and Linux, C/C++ Edition9.0, 9.0.0.1, 9.0.1, 9.1, 9.1.1

Remediation/Fixes

Product

VRMFRemediation/First Fix
Rational Developer for Power Systems Software8.5.1
  • None.
Rational Developer for i9.0 through to 9.1
Rational Developer for AIX and Linux9.0 through to 9.1

Workarounds and Mitigations

In addition to the fixes supplied above, if you are using any of the following products:

  • Rational Developer for Power Systems Software 8.5
  • Rational Developer for i 9.0, and 9.1
  • Rational Developer for AIX and Linux 9.0, and 9.1

then the following steps can be used to remove RC4 from the list of available algorithms:

1. Ensure the product is not running.

2. Locate the java.security file used by the product:
    Rational Agent Controller: install folder/AgentController/jre/lib/security/java.security
    Rational Application Developer for WebSphere Software: install folder/jdk/jre/lib/security/java.security
    Rational Build Utility: install folder/jdk/jre/lib/security/java.security

3. Edit the java.security file with a text editor and locate the line:
    jdk.tls.disabledAlgorithms=SSLv3

4. Add RC4 to the list of disabled algorithms; For example:
    jdk.tls.disabledAlgorithms=SSLv3, RC4

5. Save the file and restart the product.

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.

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support alerts like this.

References

Complete CVSS v2 Guide
On-line Calculator v2

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

* 15 April 2015: Original copy published
* 27 April 2015: Revised copy published
* 7 September 2016: Revised copy 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.

Internal Use Only

PSIRT 3058, RDi:54154 RDAL:53873

[{"Product":{"code":"SSAE4W","label":"Rational Developer for i"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":"General Information","Platform":[{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"9.0;9.0.0.1;9.0.1;9.1;9.1.1;9.1.1.1","Edition":"RPG and COBOL Tools;Modernization Tools- Java Edition;Modernization Tools- EGL Edition","Line of Business":{"code":"LOB57","label":"Power"}},{"Product":{"code":"SSPSQF","label":"Rational Developer for AIX and Linux"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":" ","Platform":[{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"9.0;9.0.0.1;9.0.1;9.1;9.1.1","Edition":"AIX COBOL Edition;C\/C++ Edition","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Product":{"code":"SSAE4W","label":"Rational Developer for i"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":" ","Platform":[{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"9.0;9.0.0.1;9.0.1;9.1;9.1.1;9.1.1.1","Edition":"RPG and COBOL Tools;Modernization Tools- Java Edition;Modernization Tools- EGL Edition","Line of Business":{"code":"LOB57","label":"Power"}},{"Product":{"code":"SS4QVT","label":"Rational Developer for Power Systems Software"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Component":" ","Platform":[{"code":"PF033","label":"Windows"},{"code":"PF016","label":"Linux"}],"Version":"8.5;8.5.1","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]

Document Information

Modified date:
02 August 2018

UID

swg21882902

Page Feedback