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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.2920
                   TMM SCTP vulnerability CVE-2020-5918
                              26 August 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-5918  

Original Bulletin: 
   https://support.f5.com/csp/article/K26464312

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K26464312: TMM SCTP vulnerability CVE-2020-5918

Security Advisory

Original Publication Date: 26 Aug, 2020

Security Advisory Description

The Traffic Management Microkernel (TMM) may stop responding when processing
Stream Control Transmission Protocol (SCTP) traffic when traffic volume is
high. This vulnerability affects TMM by way of a virtual server configured with
an SCTP profile. (CVE-2020-5918)

Impact

Traffic processing is disrupted while TMM restarts. If the affected BIG-IP
system is configured as part of a device group, the system triggers a failover
to the peer device.

Security Advisory Status

F5 Product Development has assigned ID 872673 (BIG-IP) to this vulnerability.

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, point 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|          |          |      |           |
+------------------+------+----------+----------+----------+------+-----------+
|                  |16.x  |None      |16.0.0    |          |      |           |
|                  +------+----------+----------+          |      |           |
|                  |      |15.1.0    |15.1.0.5  |          |      |           |
|                  |15.x  |15.0.0 -  |15.0.1.4  |          |      |           |
|                  |      |15.0.1    |          |          |      |           |
|                  +------+----------+----------+          |      |Virtual    |
|BIG-IP (LTM, AAM, |14.x  |14.1.0 -  |14.1.2.5  |          |      |servers    |
|AFM, Analytics,   |      |14.1.2    |          |          |      |configured |
|APM, ASM, DNS,    +------+----------+----------+Medium    |5.9   |to use a   |
|FPS, GTM, Link    |13.x  |13.1.0 -  |13.1.3.4  |          |      |SCTP       |
|Controller, PEM)  |      |13.1.3    |          |          |      |profile    |
|                  +------+----------+----------+          |      |           |
|                  |12.x  |12.1.0 -  |12.1.5.2  |          |      |           |
|                  |      |12.1.5    |          |          |      |           |
|                  +------+----------+----------+          |      |           |
|                  |11.x  |11.6.1 -  |11.6.5.2  |          |      |           |
|                  |      |11.6.5    |          |          |      |           |
+------------------+------+----------+----------+----------+------+-----------+
|                  |7.x   |None      |Not       |          |      |           |
|                  |      |          |applicable|          |      |           |
|                  +------+----------+----------+          |      |           |
|BIG-IQ Centralized|6.x   |None      |Not       |Not       |None  |None       |
|Management        |      |          |applicable|vulnerable|      |           |
|                  +------+----------+----------+          |      |           |
|                  |5.x   |None      |Not       |          |      |           |
|                  |      |          |applicable|          |      |           |
+------------------+------+----------+----------+----------+------+-----------+
|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.

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 K9502: BIG-IP hotfix and point release matrix
  o K13123: Managing BIG-IP product hotfixes (11.x - 16.x)
  o K167: Downloading software and firmware from F5
  o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents

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