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

Security Bulletin

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

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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 https://exchange.xforce.ibmcloud.com/vulnerabilities/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.

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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 v2 Guide
On-line Calculator v2

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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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Tips

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