Operating System:

[AIX]

Published:

01 May 2015

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Resources > Security Bulletins > ESB-2015.1197 

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1197
           Security Bulletin: Vulnerability in RC4 stream cipher
         affects WebSphere Voice Response for AIX (CVE-2015-2808)
                                1 May 2015

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

Product:           IBM WebSphere Voice Response for AIX
Publisher:         IBM
Operating System:  AIX
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.1188
                   ESB-2015.1187
                   ESB-2015.1183
                   ESB-2015.1168
                   ESB-2015.1166
                   ESB-2015.1160
                   ESB-2015.1159

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21882697

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Security Bulletin: Vulnerability in RC4 stream cipher affects WebSphere Voice
Response for AIX (CVE-2015-2808)

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 #:

1882697

Modified date:

2015-04-30

Security Bulletin

Summary

GSKit is an IBM component that is used by WebSphere Voice Response since Fix 
Pack 8 (Fix level 6.1.0.450). The GSKit that is shipped with WebSphere Voice 
Response contains multiple security vulnerabilities including the The RC4 Bar
Mitzvah Attack TLS/SSL client and server vulnerability. WebSphere Voice 
Response has addressed the applicable CVE.

Vulnerability Details

CVEID: CVE-2015-2808

DESCRIPTION: The RC4 algorithm, as used in the TLS protocol and SSL protocol,
could allow a remote attacker to obtain sensitive information. An attacker 
could exploit this vulnerability to remotely expose account credentials 
without requiring an active man-in-the-middle session. Successful exploitation
could allow an attacker to retrieve credit card data or other sensitive 
information. This vulnerability is commonly referred to as "Bar Mitzvah 
Attack".

CVSS Base Score: 5

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/101851 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Affected Products and Versions

WebSphere Voice Response for AIX V6.1

Remediation/Fixes

WebSphere Voice Response V6.1 fix level 6.1.0.504

APAR: IV72487

PTF: U869247

Fix Central download link:

APAR IV72487

You should verify applying this fix does not cause any compatibility issues.

Workarounds and Mitigations

Log in as dtuser.

Update $SYS_DIR/voip/cipher.ini to add comments (#) at the start of the 
following lines:

TLS_RSA_WITH_RC4_128_SHA

TLS_ECDHE_RSA_WITH_RC4_128_SHA

TLS_ECDHE_ECDSA_WITH_RC4_128_SHA

Note each line may occur multiple times and each occurrence should be 
commented out.

Now shutdown and restart WVR.

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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.

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