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Security Bulletin: IBM Sterling Connect:Direct for UNIX CPU utilization (CVE-2014-0963)

Security Bulletin


Summary

IBM Sterling Connect:Direct for UNIX is affected by a problem related to the SSL implementation which, under very specific conditions, can cause CPU utilization to rapidly increase.

Vulnerability Details

IBM Sterling Connect:Direct for UNIX 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 that causes a single thread to begin looping. If this happens multiple times, more threads will begin to loop and an increase in CPU utilization will be seen. This increase could ultimately result in CPU exhaustion and unresponsiveness of the IBM Sterling Connect:Direct for UNIX 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 IBM Sterling Connect:Direct for UNIX 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

IBM Sterling Connect:Direct for UNIX 4.2.0.0

No other version of IBM Sterling Connect:Direct for UNIX is affected

Remediation/Fixes

IBM has provided patches for all affected versions. Follow the installation instructions in the README files included with the patch.

Version APAR Remediation/First Fix
4.2.0.0 IT01935 Upgrade to or install directly from 4.2.0.1, available on Fix Central

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Complete CVSS v2 Guide
On-line Calculator v2

Related information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

30 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.

Document information

More support for: Sterling Connect:Direct for UNIX

Software version: 4.2

Operating system(s): AIX, HP-UX, Linux, Solaris

Reference #: 1673847

Modified date: 20 April 2015


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