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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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