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ESB-2014.0815 - [AIX] IBM WebSphere Voice Response: Denial of service - Remote/unauthenticated

Date: 23 May 2014
References: ESB-2014.0679  ESB-2014.0714  ESB-2014.0764  ESB-2014.0782  ESB-2014.0783  ESB-2014.0819  ESB-2014.0821  ESB-2014.0838  ESB-2014.0878  ESB-2014.0880  


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

                               ESB-2014.0815
Security Bulletin: WebSphere Voice Response CPU utilization (CVE-2014-0963)
                                23 May 2014

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

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

Product:           IBM WebSphere Voice Response
Publisher:         IBM
Operating System:  AIX
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-0963  

Reference:         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=swg21673245

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

Security Bulletin: WebSphere Voice Response CPU utilization (CVE-2014-0963)

Security Bulletin

Document information

More support for:
WebSphere Voice Response for AIX
WebSphere Voice Response

Software version:
6.1

Operating system(s):
AIX

Software edition:
All Editions

Reference #:
1673245

Modified date:
2014-05-15

Summary

WebSphere Voice Response 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:
WebSphere Voice Response 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 WebSphere Voice Response 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, without the need for authentication, but its exploitation is 
moderately complex.

To determine if your systems are being affected by this issue, you can monitor 
the CPU utilization for WebSphere Voice Response instances.

CVSS Base Score: 7.1
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/92844 
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C) CVE-2014-0963

Affected Products and Versions

WebSphere Voice Response 6.1

Remediation/Fixes

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

The fix is included in PTF U866113 and fixlevel 6.1.0.459. This can be 
downloaded from IBM Fix Central:

http://www.ibm.com/support/docview.wss?rs=761&uid=isg1IV60175

Detailed information regarding WebSphere Voice Response PTFs can be found 
here:

http://www.ibm.com/support/docview.wss?uid=swg24013881

References
Complete CVSS Guide
On-line Calculator V2

Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

*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
Facsimile:      (07) 3365 7031
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