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AUSCERT External Security Bulletin Redistribution
Security Bulletin: Rational Developer for System z CPU utili
28 May 2014
AusCERT Security Bulletin Summary
Product: IBM Rational Developer
Operating System: AIX
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2014-0963
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Security Bulletin: Rational Developer for System z CPU utilization
More support for:
Rational Developer for System z
AIX, Linux, Windows, z/OS
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.
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
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
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 188.8.131.52, 184.108.40.206 ifix 1, 220.127.116.11
IBM has provided patches for all affected versions.
Follow the installation instructions in the README files included with the
The fix can be obtained at the following location: Rational Developer for
System z 18.104.22.168, All platforms
Workarounds and Mitigations
Monitor CPU utilization of your Program Name instances. If utilization becomes
abnormally high, stop and restart the affected instance.
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
Complete CVSS Guide
On-line Calculator V2
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
* 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.
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.
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