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             AUSCERT External Security Bulletin Redistribution

                  BIG-IP TMM vulnerability CVE-2019-6594
                             26 February 2019


        AusCERT Security Bulletin Summary

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6594  

Original Bulletin: 

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K91026261:BIG-IP TMM vulnerability CVE-2019-6594

Security Advisory

Original Publication Date: 26 Feb, 2019

Security Advisory Description

Multipath TCP (MPTCP) does not protect against multiple zero length DATA_FINs
in the reassembly queue, which can lead to an infinite loop in some
circumstances. (CVE-2019-6594)


The BIG-IP system temporarily fails to process traffic as it recovers from a
Traffic Management Microkernel (TMM) restart, and devices configured in a
device group may fail over.

Security Advisory Status

F5 Product Development has assigned ID 716900 (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 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 or|
|                 |      |be        |in        |          |1     |feature     |
|                 |      |vulnerable|          |          |      |            |
|                 |14.x  |14.0.0 -  |14.1.0    |          |      |            |
|                 |      |  |  |          |      |            |
|BIG-IP (LTM, AAM,+------+----------+----------+          |      |TMM (virtual|
|AFM, Analytics,  |13.x  |13.0.0 HF1|  |          |      |servers with|
|APM, ASM, DNS,   |      |-|          |          |      |MPTCP       |
|Edge Gateway,    +------+----------+----------+Medium    |5.9   |enabled on  |
|FPS, GTM, Link   |12.x  | -|12.1.4    |          |      |an          |
|Controller, PEM, |      |  |          |          |      |associated  |
|WebAccelerator)) +------+----------+----------+          |      |TCP profile)|
|                 |11.x  |11.5.1 -  |  |          |      |            |
|                 |      |11.6.3    |          |          |      |            |
|Enterprise       |3.x   |None      |Not       |Not       |None  |None        |
|Manager          |      |          |applicable|vulnerable|      |            |
|                 |6.x   |None      |Not       |          |      |            |
|BIG-IQ           |      |          |applicable|Not       |      |            |
|Centralized      +------+----------+----------+vulnerable|None  |None        |
|Management       |5.x   |None      |Not       |          |      |            |
|                 |      |          |applicable|          |      |            |
|F5 iWorkflow     |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.



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 - 13.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
  o K16248201: TMM vulnerability CVE-2018-15318

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