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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2673 K21154730: TMM SSL/TLS profile vulnerability CVE-2017-6141 24 October 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 BIG-IP Products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-6141 Original Bulletin: https://support.f5.com/csp/article/K21154730 - --------------------------BEGIN INCLUDED TEXT-------------------- K21154730: TMM SSL/TLS profile vulnerability CVE-2017-6141 Security Advisory Original Publication Date: Jul 13, 2017 Updated Date: Jul 19, 2017 Security Advisory Description Certain values in a TLS abbreviated handshake when using a client SSL profile with the Session Ticket option enabled may cause disruption of service to the Traffic Management Microkernel (TMM). The Session Ticket option is disabled by default. (CVE-2017-6141) Impact The Traffic Management Microkernel (TMM) may restart and temporarily fail to process traffic. Security Advisory Status F5 Product Development has assigned ID 620400 (BIG-IP) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic H21154730 on the Diagnostics > Identified > High screen. To determine if your release is known to be vulnerable, the components or features that are affected by the vulnerability, and for information about releases or hotfixes that address the vulnerability, refer to the following table: +--------------+------------+--------------+----------+-----------------------+ | |Versions |Versions known| |Vulnerable component or| |Product |known to be |to be not |Severity |feature | | |vulnerable |vulnerable | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | | |12.1.2 HF1 | |Client SSL profile with| |BIG-IP LTM |12.1.0 - |12.0.0 |High |the Session Ticket | | |12.1.2 |11.4.0 - | |option enabled | | | |11.6.1 | | | | | |11.2.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | |12.1.0 - |12.1.2 HF1 | |Client SSL profile with| |BIG-IP AAM |12.1.2 |12.0.0 |High |the Session Ticket | | | |11.4.0 - | |option enabled | | | |11.6.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | |12.1.0 - |12.1.2 HF1 | |Client SSL profile with| |BIG-IP AFM |12.1.2 |12.0.0 |High |the Session Ticket | | | |11.4.0 - | |option enabled | | | |11.6.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | | |12.0.0 - | | | |BIG-IP |None |12.1.2 |Not |None | |Analytics | |11.4.0 - |vulnerable| | | | |11.6.1 | | | | | |11.2.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | | |12.1.2 HF1 | |Client SSL profile with| |BIG-IP APM |12.1.0 - |12.0.0 |High |the Session Ticket | | |12.1.2 |11.4.0 - | |option enabled | | | |11.6.1 | | | | | |11.2.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | | |12.1.2 HF1 | |Client SSL profile with| |BIG-IP ASM |12.1.0 - |12.0.0 |High |the Session Ticket | | |12.1.2 |11.4.0 - | |option enabled | | | |11.6.1 | | | | | |11.2.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 |Not | | |BIG-IP DNS |None |12.0.0 - |vulnerable|None | | | |12.1.2 | | | +--------------+------------+--------------+----------+-----------------------+ |BIG-IP Edge |None |11.2.1 |Not |None | |Gateway | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ | | |11.4.0 - |Not | | |BIG-IP GTM |None |11.6.1 |vulnerable|None | | | |11.2.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | | |12.1.2 HF1 | |Client SSL profile with| |BIG-IP Link |12.1.0 - |12.0.0 |High |the Session Ticket | |Controller |12.1.2 |11.4.0 - | |option enabled | | | |11.6.1 | | | | | |11.2.1 | | | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | |12.1.0 - |12.1.2 HF1 | |Client SSL profile with| |BIG-IP PEM |12.1.2 |12.0.0 |High |the Session Ticket | | | |11.4.0 - | |option enabled | | | |11.6.1 | | | +--------------+------------+--------------+----------+-----------------------+ |BIG-IP PSM |None |11.4.0 - |Not |None | | | |11.4.1 |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |BIG-IP |None |11.2.1 |Not |None | |WebAccelerator| | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ | | |13.0.0 | | | | |12.1.0 - |12.1.2 HF1 | |Client SSL profile with| |BIG-IP WebSafe|12.1.2 |12.0.0 |High |the Session Ticket | | | |11.6.0 - | |option enabled | | | |11.6.1 | | | +--------------+------------+--------------+----------+-----------------------+ |ARX |None |6.2.0 - 6.4.0 |Not |None | | | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |Enterprise |None |3.1.1 |Not |None | |Manager | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |BIG-IQ Cloud |None |4.4.0 - 4.5.0 |Not |None | | | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |BIG-IQ Device |None |4.4.0 - 4.5.0 |Not |None | | | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |BIG-IQ |None |4.4.0 - 4.5.0 |Not |None | |Security | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |BIG-IQ ADC |None |4.5.0 |Not |None | | | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |BIG-IQ | |5.0.0 - 5.2.0 |Not | | |Centralized |None |4.6.0 |vulnerable|None | |Management | | | | | +--------------+------------+--------------+----------+-----------------------+ |BIG-IQ Cloud | | |Not | | |and |None |1.0.0 |vulnerable|None | |Orchestration | | | | | +--------------+------------+--------------+----------+-----------------------+ |F5 iWorkflow |None |2.0.0 - 2.2.0 |Not |None | | | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |LineRate |None |2.5.0 - 2.6.2 |Not |None | | | | |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ |Traffix SDC |None |5.0.0 - 5.1.0 |Not |None | | | |4.0.0 - 4.4.0 |vulnerable| | +--------------+------------+--------------+----------+-----------------------+ Security Advisory Recommended Actions If you are running a version listed in the Versions known to be vulnerable column, you can eliminate this vulnerability by upgrading to a version listed in the Versions known to be not vulnerable column. If the table lists only an older version than what you are currently running, or does not list a non-vulnerable version, then no upgrade candidate currently exists. Mitigation There is no mitigation. To determine if you have the Session Ticket option enabled in a Client SSL profile, perform one of the following procedures: Using the Configuration utility to determine whether the Session Ticket option is enabled Impact of action: Performing the following procedure should not have a negative impact on your system. 1. Log in to the Configuration utility. 2. Navigate to Local Traffic > Profiles > SSL > Client. 3. Click the Name of your Client SSL profile. 4. From the Configuration menu, select Advanced. 5. In the Configuration section, locate the Session Ticket option. The option is enabled when the box is checked. Using tmsh to determine whether the Session Ticket option is enabled Impact of action: Performing the following procedure should not have a negative impact on your system. 1. Log in to the TMOS Shell (tmsh) by typing the following command: tmsh 2. Determine whether the Session Ticket option is enabled using the following command syntax: list /ltm profile client-ssl <profile name> session-ticket For example, determine the Session Ticket option setting for a profile named my_client_ssl, by typing the following command: list /ltm profile client-ssl my_client_ssl session-ticket If the option is enabled, the output will appear similar to the following example: ltm profile client-ssl my_client_ssl { session-ticket enabled } Supplemental Information o K9970: Subscribing to email notifications regarding F5 products o K9957: Creating a custom RSS feed to view new and updated documents o K4602: Overview of the F5 security vulnerability response policy o K4918: Overview of the F5 critical issue hotfix policy o K167: Downloading software and firmware from F5 o K13123: Managing BIG-IP product hotfixes (11.x - 13.x) o K9502: BIG-IP hotfix matrix - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWe6YlYx+lLeg9Ub1AQgKaBAAnQwXgApRFOp9kAEmf7OBs9pdIf4psjD4 6KbbhvDYyneMTKy61qxUJ5bQglUyW8RurxE6FRQF9c+tQ5fiHTGVom0QLfaSsjbQ WkUye5yxHZ3QvDN2P8MWVMJL5zni4zAcAR/BAUzCIC24qOph25qL7163SxzXIgC7 c8+i9GgDAhHAqGoH1SP5tps4O7675o3JHJ+h89zFkQzMxDRCoPdb1dhMoG88Wyt3 z1AxmY49yQf+wQo9Vez6fJ/2xGEwIVeuWqhUJHdtdHw8Ud6vkSp/z+E43XudT88y p19JJhbMFqlQ8YV1SJ+4SoDD08qQr5/MZpPVSH8r6JNJJACy/qaI6VuznciNOeS+ wdde50ZYdRl80Y6q+00HYyolh2YA+apvq8efYwsqBMj58jZ68eGWm3usUa+IyZCe 12Ha+mdgzFKnL5R/b5LlzRDNlmbWXUI6hVJEbwN3SWaZrBJFA8TYIZYyBMV1zRyB 4PifRn/yOHWTckGACrFE0Ckuc9KFHZUXOxEkEHk/vmU347isKxPMHU33P+c2LLD9 uabBUbTmfDpl3Dia0/IPwQPrLWEfNXP5VtDn+SZEw4V+HcqAE8iZ4gxz4yHS7W1l hC9hVm2MVf06eTaN+Bz73w+6FmGvFQvbjtlcIkf4+vxtO9ovJoaWrrTlWhLN62FP PFFXCsoSjDQ= =ffkP -----END PGP SIGNATURE-----