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             AUSCERT External Security Bulletin Redistribution

                               ESB-2011.1041
          BEAST Secure Socket Layer (SSL) 3.0 and Transport Layer
               Security (TLS) 1.0 exploit recently published
                              17 October 2011

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

Product:           WebSphere Application Server 6.0
                   WebSphere Application Server 6.1
                   WebSphere Application Server 7.0
                   WebSphere Application Server 8.0
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Provide Misleading Information -- Remote with User Interaction
                   Unauthorised Access            -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-3389  

Reference:         ASB-2011.0071.2
                   ESB-2011.1033
                   ESB-2011.1032
                   ESB-2011.0979

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21566866&myns=swgws&mynp=OCSSCKBL&mynp=OCSSEQTP&mync=E

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BEAST Secure Socket Layer (SSL) 3.0 and Transport Layer Security (TLS) 1.0 
exploit recently published (CVE-2011-3389)

Document information
WebSphere Application Server

Software version:
6.0, 6.1, 7.0, 8.0

Operating system(s):
AIX, HP-UX, IBM i, Linux, Solaris, Windows, i5/OS, z/OS

Software edition:
Advanced, Base, Developer, Enterprise, Express, Network Deployment

Reference #:
1566866

Modified date:
2011-10-14

Flash (Alert)

Abstract

Information on possible BEAST TLS 1.0 and/or SSL 3.0 attacks and options to 
address this issue

Content

Although this is not a WebSphere Application Server exposure, IBM is aware that 
many of our customers may be exposed to this issue, and therefore, we are 
sharing the following information, that we have presently, to assist our 
customers.

VULNERABILITY DETAILS:

CVE ID: CVE-2011-3389

Exposure Description:
On 23 September 2011, researchers demonstrated a new attack called BEAST (short 
for Browser Exploit Against SSL/TLS) at a security conference in Argentina, as 
reported by various media outlets worldwide. The researchers claim they have 
found a way to gain access to sensitive information transmitting over the 
network that is protected using the Secure Socket Layer (SSL) 3.0 and Transport 
Layer Security (TLS) 1.0 protocols. By persuading a victim to visit a Web site, 
a remote attacker could exploit this vulnerability using man-in-the-middle 
techniques to decrypt HTTPS sessions and obtain sensitive information such as 
user authentication cookies that could be further leveraged to obtain sensitive 
information such as account and credit card numbers, user names, passwords, 
etc.

CVSS:

CVSS Base Score: 4.3
Temporal Score: See the X-Force document titled SSL/TLS information disclosure 
(70069) for the current score.

CVSS Environment Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

REMEDIATION/SOLUTIONS:

Protection against the BEAST TLS 1.0 (or earlier) or SSL 3.0 threat:

Apply a Fix:

    * Contact your Web Browser Vendor: Web browser vendors are working on 
      providing modifications (fixes) on the client side that remediate this 
      type of threat. We recommend implementing remediation provided by Web 
      browser vendors, when it is available.
                + Once this fix is installed on the client side (such as a 
                  browser), there will be no need for any corresponding fix on 
                  the server side. 

REFERENCES:

    * Complete CVSS Guide:
    * National Vulnerability Database's Common Vulnerability Scoring System V2 
      Calculator On-line
    * IBM Internet Security Systems (ISS) X-Force Vulnerability Database's 
      SSL/TLS information disclosure (70069)
    * CVE-2011-3389

*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 Flash.

Note: 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.

Copyright and trademark information

IBM, the IBM logo and ibm.com are trademarks of International Business Machines 
Corp., registered in many jurisdictions worldwide. Other product and service 
names might be trademarks of IBM or other companies. A current list of IBM t
rademarks is available on the Web at "Copyright and trademark information" at 
www.ibm.com/legal/copytrade.shtml.

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