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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.2520.2 Security Bulletin: TLS padding vulnerability affects WebSphere Transformation Extender Secure Adapter Collection (CVE-2014-8730) 23 January 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM WebSphere Transformation Extender Secure Adapter Collection Publisher: IBM Operating System: AIX HP Itanium HP-UX Linux variants Solaris Windows Impact/Access: Access Privileged Data -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Mitigation CVE Names: CVE-2014-8730 Reference: ESB-2014.2511 ESB-2014.2485 ESB-2014.2484 ESB-2014.2483 ESB-2014.2482 ESB-2014.2480 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21693140 Revision History: January 23 2015: Updated to reference the available fix December 24 2014: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: TLS padding vulnerability affects WebSphere Transformation Extender Secure Adapter Collection (CVE-2014-8730) Document information More support for: WebSphere Transformation Extender Secure Adapter Collection Software version: 8.4.1.1, 8.4.1.2 Operating system(s): AIX, HP Itanium, HP-UX, Linux, Linux zSeries, Solaris, Windows Reference #: 1693140 Modified date: 2015-01-22 Security Bulletin Summary Transport Layer Security (TLS) padding vulnerability via a POODLE (Padding Oracle On Downgraded Legacy Encryption) like attack affects WebSphere Transformation Extender Secure Adapter Collection. Vulnerability Details CVE-ID: CVE-2014-8730 DESCRIPTION: Product could allow a remote attacker to obtain sensitive information, caused by the failure to check the contents of the padding bytes when using CBC cipher suites of some TLS implementations. A remote user with the ability to conduct a man-in-the-middle attack could exploit this vulnerability via a POODLE (Padding Oracle On Downgraded Legacy Encryption) like attack to decrypt sensitive information and calculate the plaintext of secure connections. CVSS Base Score: 4.3 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/99216 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) Affected Products and Versions WebSphere Transformation Extender Secure Adapter Collection 8.4.1.1 and 8.4.1.2 Remediation/Fixes Download and install the interim fix for APAR PI32341 from IBM Fix Central. Installing this fix sets the following environment variables by default: GSK_STRICTCHECK_CBCPADBYTES=GSK_TRUE GSK_STRICTCHECK_CBCPADBYTES_SSL=GSK_TRUE Verify that this configuration change does not cause compatibility issues. Workarounds and Mitigations To mitigate the vulnerability before you install the fix, set the environment variables with the following commands: For WebSphere Transformation Extender Secure Adapters Collection running on Windows, the commands are: set GSK_STRICTCHECK_CBCPADBYTES=GSK_TRUE set GSK_STRICTCHECK_CBCPADBYTES_SSL=GSK_TRUE For WebSphere Transformation Extender Secure Adapters Collection running on Linux/UNIX/AIX, the commands are: export GSK_STRICTCHECK_CBCPADBYTES=GSK_TRUE export GSK_STRICTCHECK_CBCPADBYTES_SSL=GSK_TRUE Before you start WTX, set the environment variables in the shell where WTX runs. Environment variables defined in a shell are inherited by any child processes. To set the environment variables automatically, add the commands to the profile of the user ID that WebSphere Transformation runs under. Verify that this configuration change does not cause compatibility issues. Get Notified about Future Security Bulletins Subscribe to My Notifications to be notified of important product support 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 23 December 2014: Original version published. 22 January 2015: Updated to reference the available fix. *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-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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