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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3256.2 Memory leak in Linux kernel affects F5 BIG-IP 13.0.0 12 March 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 BIG-IP products Publisher: F5 Networks Operating System: Network Appliance Virtualisation Linux variants Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-6135 Original Bulletin: https://support.f5.com/csp/article/K43322910 Comment: This advisory references vulnerabilities in the Linux kernel that also affect distributions other than F5 BIG-IP products. It is recommended that administrators running Linux check for an updated version of the kernel for their system. Revision History: March 12 2018: Updated source text with detection heuristic and affected versions December 21 2017: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K43322910: Linux kernel vulnerability CVE-2017-6135 Security Advisory Original Publication Date: Dec 21, 2017 Updated Date: Mar 10, 2018 Security Advisory Description A slow memory leak as a result of undisclosed IPv4 or IPv6 packets sent to BIG-IP management port or self IP addresses may lead to out of memory (OOM) conditions. (CVE-2017-6135) Impact An unauthenticated remote attacker may be able to exhaust BIG-IP memory resources and cause a denial of service (DoS) with maliciously crafted network traffic. Security Advisory Status F5 Product Development has assigned IDs 658764 and 660725 (BIG-IP) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic H43322910 on the Diagnostics > Identified > High page. To determine if your product and version have been evaluated for this vulnerability, refer to the Applies to (see versions) box. 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 |Fixes | |CVSSv3|Vulnerable| |Product |Branch|known to |introduced|Severity |score^|component | | | |be |in | |1 |or feature| | | |vulnerable| | | | | |-------------------+------+----------+----------+----------+------+----------| |BIG-IP (LTM, AAM, |13.x |13.0.0 |13.1.0 | | | | |AFM, Analytics, |------+----------+----------| | | | |APM, ASM, DNS, |12.x |None |Not | | |Linux | |GTM, Link | | |applicable|High |7.5 |kernel | |Controller, PEM, |------+----------+----------| | | | |WebSafe) |11.x |None |Not | | | | | | | |applicable| | | | |-------------------+------+----------+----------+----------+------+----------| |ARX |6.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | |-------------------+------+----------+----------+----------+------+----------| |Enterprise Manager |3.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | |-------------------+------+----------+----------+----------+------+----------| |BIG-IQ (Cloud, | | |Not |Not | | | |Device, Security, |4.x |None |applicable|vulnerable|None |None | |ADC) | | | | | | | |-------------------+------+----------+----------+----------+------+----------| | |5.x |None |Not | | | | |BIG-IQ Centralized | | |applicable|Not | | | |Management |------+----------+----------|vulnerable|None |None | | |4.x |None |Not | | | | | | | |applicable| | | | |-------------------+------+----------+----------+----------+------+----------| |BIG-IQ Cloud and |1.x |None |Not |Not |None |None | |Orchestration | | |applicable|vulnerable| | | |-------------------+------+----------+----------+----------+------+----------| |F5 iWorkflow |2.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | |-------------------+------+----------+----------+----------+------+----------| |LineRate |2.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | |-------------------+------+----------+----------+----------+------+----------| | |5.x |None |Not | | | | | | | |applicable|Not | | | |Traffix SDC |------+----------+----------|vulnerable|None |None | | |4.x |None |Not | | | | | | | |applicable| | | | +-----------------------------------------------------------------------------+ ^1The CVSSv3 score link takes you to a resource outside of AskF5, and it is possible that the document may be removed without our knowledge. 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 Fixes introduced in 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. Note: For details about how Security Advisory articles are versioned, and what versions are listed in the table, refer to K51812227: Understanding Security Advisory versioning. 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 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. Additionally, for BIG-IP AFM systems, you can use iptables firewall rules to limit management access to trusted sources. - --------------------------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 iQIVAwUBWqXX4Yx+lLeg9Ub1AQgEghAAl7dhxVIya5vkTtBmTtZ6TCY82yp3lvp4 nGoMzavPB5H1JVv7L/JqwQM0d/t73SQwO50kDFaFy2fcQvjzPUWLoJSRu5OlSWDR kxJEe/f+n+HSkV1OtNuqSPFf3m7WFYxQZJcCnuUB+K5voPc8voyWS5UdW0WLDCVL GneRh4WL4wGyYahn/uz8jvV3wndApTAmk3uq0eYbrYXPoIo3xbPpFJhoOy4zx/gU Ze0c+Afw0KEQj7MMCDKctPbHgjOmJSTh0dwPGeOvNeV+vspqEocIIQhSDPVVpQ0b 7og3Oh1QKRvnwVpylWmYGNL0Dap4BSqmZ3tzBZbXXPw2MWGP7rqnD45oGcTJIBxS booQDCNc2hgCvhWynwqZkm66jGpMPnpAhKOszDJEH5Dy5G+ARFd1FoBD7kRaMeJe 851Tu9Fo1CGMTCuXC3MRcj4VA24KBw/N/D24DapoxtDyy75/9aXTh3ITxIdLOVbx K3qKNYD9kPobmtnrUX/NW1MBbatnqoZJYfRHT/1SqKpChXRy6RvdNOGZOY8rhh5L HW5mllxGv/4aWIc5xKI6z12Qc8kFqqjmxIxZM1uANJSJ1RPq683Oc0UuO/KVl05i wt9o+W5xOEpsXKC23zNSfwobF9Wrti//8YjkhrFa+hd8mfUGXAsioF7iz3i2jMea it2t+RFUf8M= =mot/ -----END PGP SIGNATURE-----