Operating System:

[Appliance]

Published:

20 September 2019

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

                               ESB-2019.3563
                  BIG-IP ASM vulnerability CVE-2019-6650
                             20 September 2019

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

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

Product:           F5 BIG-IP ASM
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Unauthorised Access      -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6650  

Original Bulletin: 
   https://support.f5.com/csp/article/K04280042

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

K04280042:BIG-IP ASM vulnerability CVE-2019-6650

Security Advisory

Original Publication Date: 20 Sep, 2019

Security Advisory Description

F5 BIG-IP ASM may expose sensitive information and allow the system
configuration to be modified when using non-default settings. (CVE-2019-6650)

Impact

The vulnerability is only present on multi-bladed systems (VIPRION) with BIG-IP
ASM provisioned, on the following interfaces:

  o Management interface in versions before BIG-IP 14.1.0.
  o Any self IP with Port Lockdown configured as Allow All.  

    Note: Port Lockdown defaults to Allow None.

In both of the previous configurations, a malicious actor may be able to
connect to the affected interface to extract and/or modify sensitive
information on the system.

Security Advisory Status

F5 Product Development has assigned ID 807477 (BIG-IP ASM) 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        |          |      |or feature|
|                   |      |vulnerable|          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |15.x  |15.0.0    |15.0.1    |          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |14.x  |14.1.0    |14.1.2    |          |      |          |
|                   |      |14.0.0    |14.0.1    |          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |13.x  |13.1.0 -  |13.1.3    |          |      |          |
|BIG-IP (ASM)       |      |13.1.1    |          |          |      |          |
|                   +------+----------+----------+Critical  |9.1   |BIG-IP ASM|
|                   |12.x  |12.1.0 -  |12.1.5    |          |      |          |
|                   |      |12.1.4    |          |          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |      |11.6.1 -  |          |          |      |          |
|                   |11.x  |11.6.4    |11.6.5    |          |      |          |
|                   |      |11.5.2 -  |11.5.10   |          |      |          |
|                   |      |11.5.9    |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |15.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|                   +------+----------+----------+          |      |          |
|BIG-IP (LTM, AAM,  |14.x  |None      |Not       |          |      |          |
|AFM, Analytics,    |      |          |applicable|          |      |          |
|APM, DNS, Edge     +------+----------+----------+          |      |          |
|Gateway, FPS, GTM, |13.x  |None      |Not       |Not       |None  |None      |
|Link Controller,   |      |          |applicable|vulnerable|      |          |
|PEM,               +------+----------+----------+          |      |          |
|WebAccelerator)    |12.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|                   +------+----------+----------+          |      |          |
|                   |11.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |7.x   |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|                   +------+----------+----------+          |      |          |
|BIG-IQ Centralized |6.x   |None      |Not       |Not       |None  |None      |
|Management         |      |          |applicable|vulnerable|      |          |
|                   +------+----------+----------+          |      |          |
|                   |5.x   |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow       |2.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|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

F5 recommends upgrading to a fixed software version to fully mitigate this
vulnerability. 

Note: It is not possible to provide these fixes in an engineering hotfix for
prior versions of software. A full upgrade to a fixed release version is
required.

If you are unable to upgrade the affected systems at this time, you may
consider using the following as an interim fix:

Self IP

Change the self IP port lockdown settings from Allow All to Allow None or Allow
Default. If you require additional ports to be opened, you should use Allow
Custom. F5 recommends avoiding the use of Allow All entirely. For more
information about configuring the port lockdown settings, refer to K17333:
Overview of port lockdown behavior (12.x - 15.x).

Management interface

Beginning in BIG-IP 14.1.0, the default iptables firewall rule for the
management interface blocks remote access to the BIG-IP ASM processes,
preventing exploitation of this issue on the management interface. F5
recommends upgrading systems running BIG-IP 14.1.0 or later to resolve the
underlying issue, preventing exposure if the rule is removed.

For versions prior to BIG-IP 14.1.0, there is no full mitigation available
other than upgrading to a fixed software version. A partial mitigation is
available from F5 Support.

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