-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

                               ESB-2019.0935
                  BIG-IP HSB vulnerability CVE-2019-6604
                               22 March 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-2019-6604  

Original Bulletin: 
   https://support.f5.com/csp/article/K26455071

- --------------------------BEGIN INCLUDED TEXT--------------------

K26455071:BIG-IP HSB vulnerability CVE-2019-6604 

Security Advisory

Original Publication Date: 22 Mar, 2019

Security Advisory Description

Under certain conditions, hardware systems with a High-Speed Bridge (HSB) using
non-default Layer 2 forwarding configurations may experience a lockup of the
HSB. (CVE-2019-6604)

This vulnerability occurs when all of the following conditions are met:

  o A VLAN group is configured.
  o The vlangroup.flow.allocate database key is disabled.

    Note: This is not the default configuration.

  o You are running the BIG-IP system or BIG-IP Virtual Clustered
    Multiprocessing (vCMP) guests on one of the following hardware platforms:
       BIG-IP i850 (C117)
       BIG-IP i2x00 (C117)
       BIG-IP 3900 (C106)
       BIG-IP i4x00 (C115)
       BIG-IP 5000 (C109)
       BIG-IP i5x00 (C119)
       BIG-IP i5820-DF (C125)
       BIG-IP 6900 (D104)
       BIG-IP 7000 (D110)
       BIG-IP 8900 (D106)
       BIG-IP i7x00 (C118)
       BIG-IP i7820-DF (C126)
       BIG-IP 8950 (D107)
       BIG-IP 10000/102x0/ (D113)
       BIG-IP 10350 (D112)
       BIG-IP i10x00 (C116)
       BIG-IP 11000 (E101)
       BIG-IP 11050 (E102)
       BIG-IP i11x00 (C123)
       BIG-IP i11800-DS (C124)
       BIG-IP 12250 (D111)
       BIG-IP i15x00 (D116)
       VIPRION 2400 (B2100, B2150, B2250)
       VIPRION (B4100, B4200, B4300, B4340, B4450)

Note: BIG-IP Virtual Edition (VE) and Cloud Edition products are not affected.

Impact

The BIG-IP system stops processing traffic, eventually leading to a failover to
another host in the high availability (HA) group.

Security Advisory Status

F5 Product Development has assigned ID 722677 (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 |
|                   |      |be        |in        |          |1     |or feature|
|                   |      |vulnerable|          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |14.x  |14.0.0    |14.1.0    |          |      |          |
|                   |      |          |14.0.0.3  |          |      |          |
|                   +------+----------+----------+          |      |          |
|BIG-IP (LTM, AAM,  |13.x  |13.0.0 -  |13.1.1.2  |          |      |          |
|AFM, Analytics,    |      |13.1.1    |          |          |      |          |
|APM, ASM, DNS, Edge+------+----------+----------+          |      |          |
|Gateway, FPS, GTM, |12.x  |12.1.0 -  |12.1.3.7  |High      |7.5   |TMM       |
|Link Controller,   |      |12.1.3    |          |          |      |          |
|PEM,               +------+----------+----------+          |      |          |
|WebAccelerator)    |      |11.2.1 -  |          |          |      |          |
|                   |11.x  |11.5.8    |11.5.9    |          |      |          |
|                   |      |11.6.0 -  |11.6.4    |          |      |          |
|                   |      |11.6.3    |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |6.x   |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|                   +------+----------+----------+          |      |          |
|BIG-IQ Centralized |5.x   |None      |Not       |Not       |None  |None      |
|Management         |      |          |applicable|vulnerable|      |          |
|                   +------+----------+----------+          |      |          |
|                   |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|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |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.

Mitigation

To mitigate this vulnerability, you can enable the vlangroup.flow.allocate
database variable to allow the system to forward packets between VLAN group
members. To do so, perform the following procedure.

Enabling the vlangroup.flow.allocate database variable

 1. Log in to the TMOS Shell (tmsh) by typing the following command:

    tmsh

 2. Set the vlangroup.flow.allocate database key to enable by typing the
    following command:

    modify /sys db vlangroup.flow.allocate value enable

 3. Save the change by typing the following command:

    save /sys config

Supplemental Information

  o K14566: The High-Speed Bridge may lock up when using certain VLAN group
    configurations
  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 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

- --------------------------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
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=IJsU
-----END PGP SIGNATURE-----