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AUSCERT External Security Bulletin Redistribution
Security Bulletin: IBM Sterling Connect:Direct for UNIX CPU
4 June 2014
AusCERT Security Bulletin Summary
Product: IBM Sterling Connect:Direct
Operating System: AIX
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2014-0963
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Security Bulletin: IBM Sterling Connect:Direct for UNIX CPU utilization
More support for:
Sterling Connect:Direct for UNIX
AIX, HP-UX, Linux, Solaris
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.
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
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 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
IBM Sterling Connect:Direct for UNIX 126.96.36.199
No other version of IBM Sterling Connect:Direct for UNIX is affected
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
188.8.131.52 IT01935 Upgrade to or install directly from 184.108.40.206, available
on Fix Central
Workarounds and Mitigations
Complete CVSS Guide
On-line Calculator V2
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
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.
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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