Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2687.2 K81211720: Linux kernel vulnerability CVE-2017-6214 22 December 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 products Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-6214 Reference: ASB-2017.0141 ASB-2017.0067 ESB-2017.2379 ESB-2017.1179 ESB-2017.1136 ESB-2017.0614 Original Bulletin: https://support.f5.com/csp/article/K81211720 Revision History: December 22 2017: Vendor updated source text with patched versions October 24 2017: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K81211720: Linux kernel vulnerability CVE-2017-6214 Security Advisory Original Publication Date: Apr 14, 2017 Updated Date: Dec 22, 2017 Security Advisory Description The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the URG flag. ( CVE-2017-6214) Impact An attacker, using a specially crafted TCP packet, can force the kernel to enter an infinite loop condition. Security Advisory Status F5 Product Development has assigned IDs 653879 and 653880 (BIG-IP), ID 654212 (BIG-IQ), ID 654205 (Enterprise Manager), ID 655792 (F5 iWorkflow), and INSTALLER-2978, INSTALLER-2979, INSTALLER-2980, and INSTALLER-2981 (Traffix SDC) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic H81211720 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 known |Versions known to| |Vulnerable | |Product |to be vulnerable|be not vulnerable|Severity |component or | | | | | |feature | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | | |12.0.0 - 12.1.2 |12.1.3 | | | |BIG-IP LTM |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel | | |11.4.0 - 11.5.4 |11.5.5 | | | | |11.2.1 | | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | |BIG-IP AAM |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel | | |11.6.0 - 11.6.1 |11.6.2 | | | | |11.4.0 - 11.5.4 |11.5.5 | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | |BIG-IP AFM |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel | | |11.6.0 - 11.6.1 |11.6.2 | | | | |11.4.0 - 11.5.4 |11.5.5 | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | |BIG-IP |12.0.0 - 12.1.2 |12.1.3 | | | |Analytics |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel | | |11.4.0 - 11.5.4 |11.5.5 | | | | |11.2.1 | | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | | |12.0.0 - 12.1.2 |12.1.3 | | | |BIG-IP APM |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel | | |11.4.0 - 11.5.4 |11.5.5 | | | | |11.2.1 | | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | | |12.0.0 - 12.1.2 |12.1.3 | | | |BIG-IP ASM |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel | | |11.4.0 - 11.5.4 |11.5.5 | | | | |11.2.1 | | | | |---------------+----------------+-----------------+----------+----------------| |BIG-IP DNS |13.0.0 |13.1.0 |High |Linux kernel | | |12.0.0 - 12.1.2 |12.1.3 | | | |---------------+----------------+-----------------+----------+----------------| |BIG-IP Edge |11.2.1 |None |High |Linux kernel | |Gateway | | | | | |---------------+----------------+-----------------+----------+----------------| | |11.6.0 - 11.6.1 |11.6.2 | | | |BIG-IP GTM |11.4.0 - 11.5.4 |11.5.5 |High |Linux kernel | | |11.2.1 | | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | |BIG-IP Link |12.0.0 - 12.1.2 |12.1.3 | | | |Controller |11.6.0 - 11.6.1 |11.6.2 |High |Linux kernel | | |11.4.0 - 11.5.4 |11.5.5 | | | | |11.2.1 | | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | |BIG-IP PEM |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel | | |11.6.0 - 11.6.1 |11.6.2 | | | | |11.4.0 - 11.5.4 |11.5.5 | | | |---------------+----------------+-----------------+----------+----------------| |BIG-IP PSM |11.4.0 - 11.4.1 |None |High |Linux kernel | |---------------+----------------+-----------------+----------+----------------| |BIG-IP |11.2.1 |None |High |Linux kernel | |WebAccelerator | | | | | |---------------+----------------+-----------------+----------+----------------| | |13.0.0 |13.1.0 | | | |BIG-IP WebSafe |12.0.0 - 12.1.2 |12.1.3 |High |Linux kernel | | |11.6.0 - 11.6.1 |11.6.2 | | | |---------------+----------------+-----------------+----------+----------------| |ARX |None |6.2.0 - 6.4.0 |Not |None | | | | |vulnerable| | |---------------+----------------+-----------------+----------+----------------| |Enterprise |3.1.1 |None |High |Linux kernel | |Manager | | | | | |---------------+----------------+-----------------+----------+----------------| |BIG-IQ Cloud |4.4.0 - 4.5.0 |None |High |Linux kernel | |---------------+----------------+-----------------+----------+----------------| |BIG-IQ Device |4.4.0 - 4.5.0 |None |High |Linux kernel | |---------------+----------------+-----------------+----------+----------------| |BIG-IQ Security|4.4.0 - 4.5.0 |None |High |Linux kernel | |---------------+----------------+-----------------+----------+----------------| |BIG-IQ ADC |4.5.0 |None |High |Linux kernel | |---------------+----------------+-----------------+----------+----------------| |BIG-IQ |5.0.0 - 5.1.0 | | | | |Centralized |4.6.0 |None |High |Linux kernel | |Management | | | | | |---------------+----------------+-----------------+----------+----------------| |BIG-IQ Cloud | | | | | |and |1.0.0 |None |High |Linux kernel | |Orchestration | | | | | |---------------+----------------+-----------------+----------+----------------| |F5 iWorkflow |2.0.0 - 2.1.0 |None |High |Linux kernel | |---------------+----------------+-----------------+----------+----------------| |LineRate |None |2.5.0 - 2.6.2 |Not |None | | | | |vulnerable| | |---------------+----------------+-----------------+----------+----------------| |Traffix SDC |5.0.0 - 5.1.0 |None |High |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. To determine the necessary upgrade path for your BIG-IQ system, you should understand the BIG-IQ product offering name changes. For more information, refer to K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems . 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-13.x) and K13092: Overview of securing access to the BIG-IP system. - --------------------------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 iQIVAwUBWjxuBox+lLeg9Ub1AQiyBxAAhNxVQ/Xbdglgpci1Jn0vj0q6NVRwdsqA JeKrWFMVf1ceKwsOMnT8YoYjGxUv5m5SRlACzRqws6W8ABXLQBS8nuYps/ZaOD2g 3PwjNr2EN5oQ39feudQ9uoOxAPtXhgVem91QFX6EnGawFKq+3EdPbKwk7rrrL/HI QTIKXsrE8i+2HJvc0nOJYXT4yTt45mAD3Y3gaFem3E/ZjZfGROze29LxnnFjYB3c HthyY1dQtkV86T3C8BpHKOFRhXc15n0op6kQ1PyJFycTibMAYYMIDWwY/8HxTj53 uo9NFwe0sma3fjkeM/2h2wOzY4XZRb5cD8mSTLcn33rurAj9bdGAx6YH1mXLbrUR uOrqWbwx9pzYnfcq4p67UPZwDYvbyhQH5ZNjeexdI6yz/GSm+kiOaffOBWJIF4lv glnJ262ehRhzasgNBPPMXrctl7iJ7eT0Rx0MWXIkRD8kVj7rIDW5M90RlMk8WOja DsRRPzJjpg0T+1NBde6yTuMfFzCRqArrewUB+gplKat3L2sMizkHLn2terq+7WKY 2Djk+rsufoNF+Iv1rh6kOc49w0mw1KCEKEwhH/sZnY0vTMwA/beAvusRyExgN7v0 P5s7c14m8TFBB9Bxj3VfsLUhPZHmpcvJfuH6JV0R4BiNbhIeYbXQDk0D1Rz0gn/o caDFNG+OZeg= =T6LK -----END PGP SIGNATURE-----