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ESB-2014.0838 - [Win][Linux][AIX] IBM Rational Developer: Denial of service - Remote/unauthenticated

Date: 28 May 2014
References: ESB-2014.0679  ESB-2014.0714  ESB-2014.0764  ESB-2014.0782  ESB-2014.0783  ESB-2014.0815  ESB-2014.0819  ESB-2014.0821  ESB-2014.0878  ESB-2014.0880  


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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0838
       Security Bulletin: Rational Developer for System z CPU utili
                          zation (CVE-2014-0963)
                                28 May 2014

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Rational Developer
Publisher:         IBM
Operating System:  AIX
                   Linux variants
                   Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-0963  

Reference:         ESB-2014.0821
                   ESB-2014.0819
                   ESB-2014.0815
                   ESB-2014.0783
                   ESB-2014.0782
                   ESB-2014.0764
                   ESB-2014.0714
                   ESB-2014.0679

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21673259

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: Rational Developer for System z CPU utilization 
(CVE-2014-0963)

Security Bulletin

Document information

More support for:

Rational Developer for System z

Documentation

Software version:

9.0.1.1, 9.0.1.2

Operating system(s):

AIX, Linux, Windows, z/OS

Reference #:

1673259

Modified date:

2014-05-20

Summary

IBM Rational Developer for System z is affected by a problem related to the 
SSL implementation which, under very specific conditions, can cause CPU 
utilization to rapidly increase.

Vulnerability Details

CVE ID: CVE-2014-0963

Description: Rational Developer for System z is affected by a problem with the
handling of certain SSL messages. The TLS implementation can, under very 
specific conditions, cause CPU utilization to rapidly increase. The situation
occurs only in a certain error case. If this error case happens multiple 
times, an increase in CPU utilization will be seen. This increase could 
ultimately result in CPU exhaustion and unresponsiveness of the Rational 
Developer for System z and other software running on the affected system.

This issue can affect the availability of the system, but does not impact 
system confidentiality or integrity. This vulnerability can be remotely 
exploited, authentication is not required and the exploit is moderately 
complex.

To determine if your systems are being affected by this issue, you can monitor
the CPU utilization for Rational Developer for System z instances.

CVSS Base Score: 7.1

CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/92844 for the 
current score

CVSS Environmental Score*: Undefined

CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C)

Affected Products and Versions

Rational Developer for System z Version 9.0.1.1, 9.0.1.1 ifix 1, 9.0.1.2

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 location: Rational Developer for 
System z 9.0.1.0, All platforms

Workarounds and Mitigations

Monitor CPU utilization of your Program Name instances. If utilization becomes
abnormally high, stop and restart the affected instance.

Important note

IBM strongly suggests that all System z customers be subscribed to the System
z Security Portal to receive the latest critical System z security and 
integrity service. If you are not subscribed, see the instructions on the 
System z Security web site. Security and integrity APARs and associated fixes
will be posted to this portal. IBM suggests reviewing the CVSS scores and 
applying all security or integrity fixes as soon as possible to minimize any 
potential risk.

References

Complete CVSS Guide

On-line Calculator V2

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

* 19 May 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.

Disclaimer

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.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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===========================================================================
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