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AUSCERT External Security Bulletin Redistribution
ESB-2015.1643
Security Bulletin: Vulnerability in RC4 stream cipher
affects IBM Tealeaf Customer Experience (CVE-2015-2808)
25 June 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Tealeaf Customer Experience
Publisher: IBM
Operating System: Linux variants
Windows
Virtualisation
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2808
Reference: ESB-2015.1620
ESB-2015.1599
ESB-2015.1585
ESB-2015.1583
ESB-2015.1568
ESB-2015.1524
ESB-2015.1512
ESB-2015.1511
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21903393
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Security Bulletin: Vulnerability in RC4 stream cipher affects IBM Tealeaf
Customer Experience (CVE-2015-2808)
Document information
More support for:
Tealeaf Customer Experience
Software version:
Version Independent
Operating system(s):
Platform Independent
Reference #:
1903393
Modified date:
2015-06-24
Security Bulletin
Summary
The RC4 Bar Mitzvah Attack for SSL/TLS affects IBM Tealeaf Customer
Experience.
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
IBM Tealeaf Customer Experience: V9.x, V8.x, V7.x
Remediation/Fixes
Product VRMF Remediation/First Fix
IBM Tealeaf 9.0.1A PCA:
Customer Experience http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=9.0.1A_IBMTealeaf_PCA-3723-1_SecurityRollup_FixPack&continue=1
Tealeaf CX:
http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=9.0.1A_TL_CXUpgrade_FixPack1&continue=1
IBM Tealeaf 9.0.1 PCA:
Customer Experience http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=9.0.1_IBMTealeaf_PCA-3672-1_SecurityRollup_FixPack&continue=1
Tealeaf CX:
http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=IBMTealeafCX_OpenSSL1.0.2a_SecurityAdvisoryPatch2&continue=1
IBM Tealeaf 9.0, 9.0A Upgrade to a higher release and apply the fix provided above.
Customer Experience
IBM Tealeaf 8.8 PCA:
Customer Experience http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=8.8_IBMTealeaf_PCA-3624-1_SecurityRollup_FixPack&continue=1
Tealeaf CX:
http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=IBMTealeafCX_OpenSSL1.0.2a_SecurityAdvisoryPatch2&continue=1
IBM Tealeaf 8.7 PCA:
Customer Experience http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=8.7_IBMTealeaf_PCA-3614-1_SecurityRollup_FixPack&continue=1
Tealeaf CX:
http://www.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=IBMTealeafCX_OpenSSL1.0.2a_SecurityAdvisoryPatch2&continue=1
IBM Tealeaf 8.6 and earlier Upgrade to a higher release and apply the fix provided above. Customers on 8.6
Customer Experience and earlier can contact our technical support team for further guidance.
You should verify applying these fixes do not cause any compatibility issues.
The fix disables RC4 stream cipher by default. If you change the default
setting after applying the fix, you will expose yourself to the attack
described above. IBM recommends that you review your entire environment to
identify other areas where you have enabled the RC4 stream cipher and take
appropriate mitigation and remediation actions.
Workarounds and Mitigations
PCA: In addition to applying the fix pack above, you must update the
/opt/tealeaf/etc/httpd.conf file by:
adding (or changing if already present) a line beginning "SSLProtocol" so that
it reads
SSLProtocol All -SSLv2 -SSLv3
changing the line beginning SSLCipherSuite by replacing the string RC4+RSA
with !RC4 so that it reads:
SSLCipherSuite ALL:!ADH:!EXP:!RC4:+HIGH:+MEDIUM
You should verify applying this configuration change does not cause any
compatibility issues. Not disabling the RC4 stream cipher will expose yourself
to the attack described above. IBM recommends that you review your entire
environment to identify other areas where you have enabled the RC4 stream
cipher and take appropriate mitigation and remediation actions.
Get Notified about Future Security Bulletins
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alerts like this.
References
Complete CVSS Guide
On-line Calculator V2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
24 June 2015: Original Version 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.
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