Security Bulletin: Vulnerability in RC4 stream cipher affects Rational Developer for System z (CVE-2015-2808)

Summary

The RC4 “Bar Mitzvah” Attack for SSL/TLS affects Rational Developer for System z.

Vulnerability Details

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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&gt; 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

Principal Product and Version(s)

| Affected Supporting Product and Version
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Rational Developer for System z, versions 8.5.x, 9.0.x, 9.1.x|

• IBM SDK, Java Technology Edition, Version 6 Service Refresh 16 FP3 (IV70681) and earlier
• IBM SDK, Java Technology Edition, Version 7 Service Refresh 8 and earlier

• Remediation/Fixes

IBM has provided patches for all affected versions.

Follow the installation instructions in the README files included with the patch.

The fix can be obtained at the following locations:

• Rational Developer for System z Interim Fix 4 for 8.5.x
• Rational Developer for System z Interim Fix 4 for 9.0.x
• Rational Developer for System z Interim Fix 4 for 9.1.x
• 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.