Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0693 Kernel vulnerability CVE-2016-6828 6 March 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 BIG-IP products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-6828 Reference: ASB-2016.0103 ESB-2017.0456 ESB-2017.0273 ESB-2017.0132 ESB-2017.0131 ESB-2017.0029 ESB-2016.2856 ESB-2016.2687 Original Bulletin: https://support.f5.com/csp/article/K62442245 - --------------------------BEGIN INCLUDED TEXT-------------------- K62442245:Kernel vulnerability CVE-2016-6828 Security Advisory Original Publication Date: 21 Dec, 2016 Latest Publication Date: 06 Mar, 2019 Security Advisory Description The tcp_check_send_head function in include/net/tcp.h in the Linux kernel before 4.7.5 does not properly maintain certain SACK state after a failed data copy, which allows local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option. (CVE-2016-6828) Impact A local user may cause a denial-of-service (DoS) by way of a crafted SACK option. Security Advisory Status F5 Product Development has assigned IDs 633655, 633656, and 624722 (BIG-IP), ID 633602 (BIG-IQ), ID 634365 (Enterprise Manager) and ID 634431 (F5 iWorkflow) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic H635143 on the Diagnostics > Identified > Medium 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 known |Versions known to| |Vulnerable | |Product |to be vulnerable|be not vulnerable|Severity |component or | | | | | |feature | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 | | | | | |12.0.0 - 12.1.4 |13.0.1 | | | |BIG-IP LTM |11.4.0 - 11.6.3 |13.0.0 HF2 |Medium |Linux kernel | | |11.2.1 | | | | | |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 |13.0.1 | | | |BIG-IP AAM |12.0.0 - 12.1.4 |13.0.0 HF2 |Medium |Linux kernel | | |11.4.0 - 11.6.3 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 |13.0.1 | | | |BIG-IP AFM |12.0.0 - 12.1.4 |13.0.0 HF2 |Medium |Linux kernel | | |11.4.0 - 11.6.3 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 | | | | |BIG-IP |12.0.0 - 12.1.4 |13.0.1 |Medium |Linux kernel | |Analytics |11.4.0 - 11.6.3 |13.0.0 HF2 | | | | |11.2.1 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 | | | | | |12.0.0 - 12.1.4 |13.0.1 | | | |BIG-IP APM |11.4.0 - 11.6.3 |13.0.0 HF2 |Medium |Linux kernel | | |11.2.1 | | | | | |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 | | | | | |12.0.0 - 12.1.4 |13.0.1 | | | |BIG-IP ASM |11.4.0 - 11.6.3 |13.0.0 HF2 |Medium |Linux kernel | | |11.2.1 | | | | | |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ |BIG-IP DNS |13.0.0 |13.0.1 |Medium |Linux kernel | | |12.0.0 - 12.1.4 |13.0.0 HF2 | | | +---------------+----------------+-----------------+----------+----------------+ |BIG-IP Edge |11.2.1 |None |Medium |Linux kernel | |Gateway |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ | |11.4.0 - 11.6.3 | | | | |BIG-IP GTM |11.2.1 |None |Medium |Linux kernel | | |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 | | | | |BIG-IP Link |12.0.0 - 12.1.4 |13.0.1 | | | |Controller |11.4.0 - 11.6.3 |13.0.0 HF2 |Medium |Linux kernel | | |11.2.1 | | | | | |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 |13.0.1 | | | |BIG-IP PEM |12.0.0 - 12.1.4 |13.0.0 HF2 |Medium |Linux kernel | | |11.4.0 - 11.6.3 | | | | +---------------+----------------+-----------------+----------+----------------+ |BIG-IP PSM |11.4.0 - 11.4.1 |None |Medium |Linux kernel | | |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ |BIG-IP |11.2.1 |None |Medium |Linux kernel | |WebAccelerator |10.2.1 - 10.2.4 | | | | +---------------+----------------+-----------------+----------+----------------+ | |13.0.0 |13.0.1 |Medium | | |BIG-IP WebSafe |12.0.0 - 12.1.4 |13.0.0 HF2 | |Linux kernel | | |11.4.0 - 11.6.3 | | | | +---------------+----------------+-----------------+----------+----------------+ |ARX |None |6.2.0 - 6.4.0 |Not |None | | | | |vulnerable| | +---------------+----------------+-----------------+----------+----------------+ |Enterprise |3.1.1 |None |Medium |Linux kernel | |Manager | | | | | +---------------+----------------+-----------------+----------+----------------+ |BIG-IQ Cloud |4.0.0 - 4.5.0 |None |Medium |Linux kernel | +---------------+----------------+-----------------+----------+----------------+ |BIG-IQ Device |4.2.0 - 4.5.0 |None |Medium |Linux kernel | +---------------+----------------+-----------------+----------+----------------+ |BIG-IQ Security|4.0.0 - 4.5.0 |None |Medium |Linux kernel | +---------------+----------------+-----------------+----------+----------------+ |BIG-IQ ADC |4.5.0 |None |Medium |Linux kernel | +---------------+----------------+-----------------+----------+----------------+ |BIG-IQ |6.0.0 - 6.1.0 | | | | |Centralized |5.0.0 - 5.4.0 |None |Medium |Linux kernel | |Management |4.6.0 | | | | +---------------+----------------+-----------------+----------+----------------+ |BIG-IQ Cloud | | | | | |and |1.0.0 |None |Medium |Linux kernel | |Orchestration | | | | | +---------------+----------------+-----------------+----------+----------------+ |F5 iWorkflow |2.0.0 - 2.3.0 |None |Medium |Linux kernel | +---------------+----------------+-----------------+----------+----------------+ |LineRate |None |2.5.0 - 2.6.1 |Not |None | | | | |vulnerable| | +---------------+----------------+-----------------+----------+----------------+ |Traffix SDC |5.0.0 - 5.1.0 |None |Low |Linux kernel | | |4.0.0 - 4.4.0 | | | | +---------------+----------------+-----------------+----------+----------------+ 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 To mitigate this vulnerability, you should permit management access to F5 products only over a secure network and restrict command line access for affected systems to only trusted users. For more information, refer to K13309: Restricting access to the Configuration utility by source IP address (11.x - 14.x) and K13092: Overview of securing access to the BIG-IP system. Supplemental Information o K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems 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 - --------------------------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 iQIVAwUBXH8rimaOgq3Tt24GAQjytA//X/tZ1eu2FEprUNp00u07YUYtuResvgRr UC9jYGjLSqfd0I/UUnwntHvS43wGxUaiBWwR1CCAlaVyurN7jFAjvU6C2zlym66u 4BbgzQPXhW4DgLOSkSbgj0FuL/YHFx1/YU8r6wV7KhU4+k9OrqzijOOY7dZotpQB A8AnR1PWvbwILZ7V5ssa4vAeK1RHMMqTCJ90xWH6wr531s1Yn8BR+TkkuZuuu6aV rkgc7fL7NZ8Vd1E85AMwtvPZC2bsMtRdhxmIIKUa4+0zPMVshtTeLcwg1/JPkV05 UGwV0siBCSiKCZb96+UG92DKkLwjn5x6vhCE13AnQrRRvVkJ2A8gLby7LcVF0912 YEPB7bUPQRJNa0WivdH3g3mulEK0gW7f5FKbZ3h3vxQWdAOeCY2FjNub2hlauwMN wU0bn6SfZWD4delZGagvxkQQ8/myw6nl592adA7enj74nMe3iKb7Qp77Fvuzhfqg +pPqt3CCeKRyh6OCoifw6lqc/E+scPs/j2hYDUTBZRcMGKQaxKtYaNwb4he85J8l PRLch4vIrV1n0t2MjPI4wnm8Bee+YRvX4GAt86/K+C4NbAQEQsXBHvDNJfH18rT6 JdVWAugnm1PEX9pI/W06MgmDP6vF/K0SbxtIMwkGpt+Mzo0n/makBx9ph0CEsJ2X Uuexak2ks0U= =gl4T -----END PGP SIGNATURE-----