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Security Bulletin: Man In The Middle Attack Vulnerability Affecting Rational Developer for AIX and Linux, Rational Developer for i, and Rational Developer for Power Systems Software (CVE-2014-0411)

Security Bulletin


The version of the Java Runtime Environment shipped with certain versions of Rational Developer for AIX and Linux, Rational Developer for i, and Rational Developer for Power Systems Software has security vulnerabilities which affect these products.

Vulnerability Details

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CVEID: CVE-2014-0411

Rational Developer for AIX and Linux, Rational Developer for i, and Rational Developer for Power Systems Software all ship the IBM Java Runtime Environment, certain versions of which are vulnerable to a Man In The Middle attack. When connecting to a remote system via Java's JSSE/TLS mechanism (e.g. via SSH or SSL) timing differences based on the validity of messages can be exploited to decrypt the entire session. The exploit is not trivial, requiring a man-in-the-middle position and a long time (around 20 hours). Hence any communications from the IDE client to the IDE server are potentially vulnerable, as are any number of other services within the IDE which make use of JSSE/TLS.

CVSS Base Score: 4
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:H/Au:N/C:P/I:P/A:N)

Affected Products and Versions

Product Name

Versions Affected
Rational Developer for Power Systems Software7.6,,, 8.0,,,, 8.0.3,, 8.5, 8.5.1
Rational Developer for AIX and Linux, C/C++ Edition9.0,
Rational Developer for AIX and Linux, AIX COBOL Edition9.0,
Rational Developer for i9.0,


There is a fix to the JRE that eliminates the timing differences. This fix has been incorporated into fixes for the affected products which are available at:

Rational Developer for AIX and LinuxInterim FixIBM Java Quarterly Critical Patch Update - April 2014
Rational Developer for iInterim FixIBM Java Quarterly Critical Patch Update - April 2014
Rational Developer for Power Systems SoftwareInterim FixIBM Java Quarterly Critical Patch Update - April 2014

Workarounds and Mitigations


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Change History

* 28 July 2014: Original 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.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Internal Use Only

PSIRT # 1455 Record # 32992

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Document Information

Modified date:
02 August 2018