Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2413.3 BIND vulnerability CVE-2018-5743 24 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: F5 BIG-IP Products F5 Enterprise Manager F5 BIG-IQ Centralized Management F5 iWorkflow Publisher: F5 Networks Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-5743 Reference: ESB-2019.2164 ESB-2019.2152 ESB-2019.2082 ESB-2019.2052 Original Bulletin: https://support.f5.com/csp/article/K74009656 Comment: This bulletin contains two (2) F5 Networks security advisories. Revision History: October 24 2019: Vendor updated article K74009656 August 12 2019: Vendor added some affected and patched versions July 3 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- K74009656:BIND vulnerability CVE-2018-5743 Security Advisory Original Publication Date: 25 Apr, 2019 Latest Publication Date: 10 Aug, 2019 Security Advisory Description ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided. (CVE-2018-5743) By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contains an error which can be exploited to grow the number of simultaneous connections beyond this limit. Impact BIG-IP / BIG-IQ / Enterprise Manager / F5 iWorkflow An attacker may exhaust file descriptors available to the named process; as a result, network connections and the management of log files or zone journal files may be affected. In BIG-IQ / Enterprise Manager / F5 iWorkflow standard and default configurations, exposure is limited to localhost, and there is no remote exposure. Traffix SDC There is no impact; this F5 product is not affected by this vulnerability. Security Advisory Status F5 Product Development has assigned ID 757023 (BIG-IP), ID 758914 (BIG-IQ), and ID 758915 (F5 iWorkflow) to this vulnerability. Additionally, F5 iHealth may list Heuristic H74009656 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. For more information about security advisory versioning, refer to K51812227: Understanding Security Advisory versioning. +-------------------+------+----------+----------+----------+------+----------+ | | |Versions |Fixes | |CVSSv3|Vulnerable| |Product |Branch|known to |introduced|Severity |score^|component | | | |be |in | |1 |or feature| | | |vulnerable| | | | | +-------------------+------+----------+----------+----------+------+----------+ | |15.x |15.0.0 |None | | | | | +------+----------+----------+ | | | | |14.x |14.0.0 - |14.1.0.6 | | | | |BIG-IP (LTM, AAM, | |14.1.0 |14.0.0.5 | | | | |AFM, Analytics, +------+----------+----------+ | | | |APM, ASM, DNS, Edge|13.x |13.0.0 - |13.1.3 | | | | |Gateway, FPS, GTM, | |13.1.1 | |High |7.5 |named | |Link Controller, +------+----------+----------+ | | | |PEM, |12.x |12.1.0 - |12.1.5 | | | | |WebAccelerator) | |12.1.4 | | | | | | +------+----------+----------+ | | | | |11.x |11.5.2 - |None | | | | | | |11.6.4 | | | | | +-------------------+------+----------+----------+----------+------+----------+ |Enterprise Manager |3.x |3.1.1 |None |Low |2.5 |named | +-------------------+------+----------+----------+----------+------+----------+ | |6.x |6.0.0 - |None | | | | |BIG-IQ Centralized | |6.1.0 | | | | | |Management +------+----------+----------+Low |2.5 |named | | |5.x |5.0.0 - |None | | | | | | |5.4.0 | | | | | +-------------------+------+----------+----------+----------+------+----------+ |F5 iWorkflow |2.x |2.3.0 |None |Low |2.5 |named | +-------------------+------+----------+----------+----------+------+----------+ |Traffix SDC |5.x |None |Not |Not |None |None | | | | |applicable|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 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. Mitigation None =============================================================================== K74009656:BIND vulnerability CVE-2018-5743 Security Advisory Original Publication Date: 25 Apr, 2019 Latest Publication Date: 23 Oct, 2019 Security Advisory Description By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743. ( CVE-2018-5743) Impact BIG-IP / BIG-IQ / Enterprise Manager / F5 iWorkflow An attacker may exhaust file descriptors available to the named process; as a result, network connections and the management of log files or zone journal files may be affected. In BIG-IQ / Enterprise Manager / F5 iWorkflow standard and default configurations, exposure is limited to localhost, and there is no remote exposure. Traffix SDC There is no impact; this F5 product is not affected by this vulnerability. Security Advisory Status F5 Product Development has assigned ID 757023 (BIG-IP), ID 758914 (BIG-IQ), and ID 758915 (F5 iWorkflow) to this vulnerability. Additionally, F5 iHealth may list Heuristic H74009656 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. For more information about security advisory versioning, refer to K51812227: Understanding Security Advisory versioning. +-------------------+------+----------+----------+----------+------+----------+ | | |Versions |Fixes | |CVSSv3|Vulnerable| |Product |Branch|known to |introduced|Severity |score^|component | | | |be |in | |1 |or feature| | | |vulnerable| | | | | +-------------------+------+----------+----------+----------+------+----------+ | |15.x |15.0.0 |15.0.1 | | | | | +------+----------+----------+ | | | | |14.x |14.0.0 - |14.1.0.6 | | | | |BIG-IP (LTM, AAM, | |14.1.0 |14.0.0.5 | | | | |AFM, Analytics, +------+----------+----------+ | | | |APM, ASM, DNS, Edge|13.x |13.0.0 - |13.1.3 | | | | |Gateway, FPS, GTM, | |13.1.1 | |High |7.5 |named | |Link Controller, +------+----------+----------+ | | | |PEM, |12.x |12.1.0 - |12.1.5 | | | | |WebAccelerator) | |12.1.4 | | | | | | +------+----------+----------+ | | | | |11.x |11.5.2 - |11.6.5.1 | | | | | | |11.6.5 | | | | | +-------------------+------+----------+----------+----------+------+----------+ |Enterprise Manager |3.x |3.1.1 |None |Low |2.5 |named | +-------------------+------+----------+----------+----------+------+----------+ | |6.x |6.0.0 - |None | | | | |BIG-IQ Centralized | |6.1.0 | | | | | |Management +------+----------+----------+Low |2.5 |named | | |5.x |5.0.0 - |None | | | | | | |5.4.0 | | | | | +-------------------+------+----------+----------+----------+------+----------+ |F5 iWorkflow |2.x |2.3.0 |None |Low |2.5 |named | +-------------------+------+----------+----------+----------+------+----------+ |Traffix SDC |5.x |None |Not |Not |None |None | | | | |applicable|vulnerable| | | +-------------------+------+----------+----------+----------+------+----------+ ^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. F5 will not develop a fix for vulnerable products that do not already have a fixed version listed in this article, and will not update this table with subsequent vulnerable releases in the associated branches. F5 recommends that you update to more recent, non-vulnerable versions whenever feasible. For more information, refer to K4602: Overview of the F5 security vulnerability response policy. 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. Mitigation None Supplemental Information o K51812227: Understanding Security Advisory versioning o K41942608: Overview of Security Advisory articles o K4602: Overview of the F5 security vulnerability response policy o K4918: Overview of the F5 critical issue hotfix policy o K9970: Subscribing to email notifications regarding F5 products o K9957: Creating a custom RSS feed to view new and updated documents - --------------------------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 iQIVAwUBXbEGOmaOgq3Tt24GAQjzbw/+MbgRsvcZ+UQaKsNFJH3Z8fOxOBmyZd4l rBRyJt8lX5VRRa34pOebXt4lhd7YLAEqtd8YKg4W3OGGY30AmSSoTWgU3zL2cOb3 PZP+Myd2fUuEqh4Cf1pfgrDDgvzCWbHaypp9NeEVo4+d5toQd4hxHjACx/7XlJrJ rq1EHMm7CH7v01/EkKoiV2BlN1+PiKi8YcdoQRauv3tdF8AaagSuTc/r0rZ3eRTy uk9wfteTOY+GXBPV9+DLEtrfMJToePKMMzk/X4PipJjFnKspHyO0xl8ek7c0Ykri ILlqR4vnlplXazNr79ysWmmKOvMakL0fQ8nlnW1orrw7gwPSlZoLCg4ewUgcsR9t cdvwxNJ++EF2a/Gp9nx8KVQUlxFa5/iC863YRPvGPqB7FQr9BKedt86uyMFn6ZG3 TGcKFXkWJTBIyxXY0AO0NdtSFnwza/1sbTaHUepp112FFt/Zdg4VUdT7uAVpSV3z /U6dzQ122fheselAw1siLKkB6bR3KQ6bO0fMSnxkyxwHqdfP5WOAhiVsMRkBaQy7 pzFFU2x46tkBOei3SfdPXMj0Vvmro1aGe5dezbIXsHOA8d7XQEWYwK/oEMhPqgxz Urh3WzyNJFcI6YDLH5HAUqd/0u77wef0dxe3NCHxPVr8QQUWs8aN1PPqakOkY/d+ DLJIEGo6WpA= =p57o -----END PGP SIGNATURE-----