ESB-2017.2383.4 - UPDATE [Appliance] F5 Products: Execute arbitrary code/commands - Remote/unauthenticated 2018-07-26

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

                              ESB-2017.2383.4
               K52320548: Expat vulnerability CVE-2016-0718
                               26 July 2018

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

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

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-0718  

Reference:         ESB-2016.2815

Original Bulletin: 
   https://support.f5.com/csp/article/K52320548

Revision History:  July      26 2018: Updated security advisory status table.
                   June      19 2018: Updated security advisory status table.
                   April      4 2018: Updated "Security Advisory Status" section
                   September 21 2017: Initial Release

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K52320548: Expat vulnerability CVE-2016-0718

Security Advisory

Original Publication Date: Sep 19, 2017
Updated Date: Jul 24, 2018

Security Advisory Description

An out-of-bounds read flaw was found in the way Expat processed certain input.
A remote attacker could send specially crafted XML that, when parsed by an
application using the Expat library, would cause that application to crash or,
possibly, execute arbitrary code with the permission of the user running the
application. (CVE-2016-0718)

Impact

A remote attacker could send specially crafted XML which, when parsed by an
application using the Expat library, would cause that application to stop
responding or possibly run arbitrary code with the permission of the user
running the application.

BIG-IP ASM control plane

An authenticated user with the relevant privileges, such as Web Application
Security Editor, can exploit the vulnerability and gain full control of the
system.

big3d/gtmd

The big3d/gtmd processes may be exposed to this vulnerability over the
management port and self IP addresses when the Port Lockdown setting is set to
Default, All, or Custom with TCP port 4353 included. The impact for the big3d
process is a temporary disruption in the communication between peer systems
until the system automatically restarts the big3d process.

Security Advisory Status

F5 Product Development has assigned IDs 630446 and 674189 (BIG-IP) and ID
677266 (Enterprise Manager) to this vulnerability. Additionally, BIG-IP iHealth
may list Heuristic H52320548 on the Diagnostics > Identified > High page.

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.

+--------------+--------------+----------------+----------+-------------------+
|              |Versions known|Versions known  |          |Vulnerable         |
|Product       |to be         |to be not       |Severity  |component or       |
|              |vulnerable    |vulnerable      |          |feature            |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |                   |
|BIG-IP LTM    |11.6.0 -      |12.1.3.2        |High      |iControl SOAP,     |
|              |11.6.3        |11.6.3.2        |          |eventd             |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
|              |11.2.1        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |iControl SOAP,     |
|BIG-IP AAM    |11.6.0 -      |12.1.3.2        |High      |eventd             |
|              |11.6.3        |11.6.3.2        |          |                   |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |iControl SOAP,     |
|BIG-IP AFM    |11.6.0 -      |12.1.3.2        |High      |eventd             |
|              |11.6.3        |11.6.3.2        |          |                   |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |                |          |                   |
|              |12.1.3        |13.1.0          |          |                   |
|BIG-IP        |11.6.0 -      |13.0.1          |High      |iControl SOAP,     |
|Analytics     |11.6.3        |12.1.3.2        |          |eventd             |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
|              |11.2.1        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |                   |
|BIG-IP APM    |11.6.0 -      |12.1.3.2        |High      |iControl SOAP,     |
|              |11.6.3        |11.6.3.2        |          |eventd             |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
|              |11.2.1        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |ASM control plane, |
|BIG-IP ASM    |11.6.0 -      |12.1.3.2        |High      |iControl SOAP,     |
|              |11.6.3        |11.6.3.2        |          |eventd             |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
|              |11.2.1        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |13.1.0          |          |big3d, gtmd,       |
|BIG-IP DNS    |12.0.0 -      |13.0.1          |High      |iControl SOAP,     |
|              |12.1.3        |12.1.3.2        |          |eventd             |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IP Edge   |11.2.1        |None            |High      |iControl SOAP,     |
|Gateway       |              |                |          |eventd             |
+--------------+--------------+----------------+----------+-------------------+
|              |11.6.0 -      |                |          |                   |
|              |11.6.3        |11.6.3.2        |          |big3d, gtmd,       |
|BIG-IP GTM    |11.4.1 -      |11.5.7          |High      |iControl SOAP,     |
|              |11.5.6        |                |          |eventd             |
|              |11.2.1        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |big3d, gtmd,       |
|BIG-IP Link   |11.6.0 -      |12.1.3.2        |High      |iControl SOAP,     |
|Controller    |11.6.3        |11.6.3.2        |          |eventd             |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
|              |11.2.1        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |                |          |                   |
|              |12.0.0 -      |13.1.0          |          |                   |
|              |12.1.3        |13.0.1          |          |iControl SOAP,     |
|BIG-IP PEM    |11.6.0 -      |12.1.3.2        |High      |eventd             |
|              |11.6.3        |11.6.3.2        |          |                   |
|              |11.4.1 -      |11.5.7          |          |                   |
|              |11.5.6        |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IP PSM    |11.4.1        |None            |High      |iControl SOAP,     |
|              |              |                |          |eventd             |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IP        |11.2.1        |None            |High      |iControl SOAP,     |
|WebAccelerator|              |                |          |eventd             |
+--------------+--------------+----------------+----------+-------------------+
|              |13.0.0        |13.1.0          |          |                   |
|              |12.0.0 -      |13.0.1          |          |iControl SOAP,     |
|BIG-IP WebSafe|12.1.3        |12.1.3.2        |High      |eventd             |
|              |11.6.0 -      |11.6.3.2        |          |                   |
|              |11.6.3        |11.5.7          |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|ARX           |None          |6.2.0 - 6.4.0   |Not       |None               |
|              |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|Enterprise    |3.1.1         |None            |Medium    |iControlPortal.cgi |
|Manager       |              |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IQ Cloud  |None          |4.4.0 - 4.5.0   |Not       |None               |
|              |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IQ Device |None          |4.4.0 - 4.5.0   |Not       |None               |
|              |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IQ        |None          |4.4.0 - 4.5.0   |Not       |None               |
|Security      |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IQ ADC    |None          |4.5.0           |Not       |None               |
|              |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IQ        |              |5.0.0 - 5.3.0   |Not       |                   |
|Centralized   |None          |4.6.0           |vulnerable|None               |
|Management    |              |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|BIG-IQ Cloud  |              |                |Not       |                   |
|and           |None          |1.0.0           |vulnerable|None               |
|Orchestration |              |                |          |                   |
+--------------+--------------+----------------+----------+-------------------+
|F5 iWorkflow  |None          |2.0.0 - 2.3.0   |Not       |None               |
|              |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|LineRate      |None          |2.5.0 - 2.6.2   |Not       |None               |
|              |              |                |vulnerable|                   |
+--------------+--------------+----------------+----------+-------------------+
|Traffix SDC   |None          |5.0.0 - 5.1.0   |Not       |None               |
|              |              |4.0.0 - 4.4.0   |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 Versions known to be not vulnerable 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

iControl SOAP, eventd and BIG-IP ASM control plane

To mitigate this vulnerability for iControl SOAP, the eventd process, and the
BIG-IP ASM control plane, permit management access to F5 products only over a
secure network and restrict command line access for affected systems to trusted
users. For more information, refer to K13309: Restricting access to the
Configuration utility by source IP address (11.x - 13.x) and K13092: Overview
of securing access to the BIG-IP system.

big3d/gtmd

To mitigate this vulnerability for the big3d/gtmd process, limit connections to
port 4353 to trusted hosts. For more information, refer to K13309: Restricting
access to the Configuration utility by source IP address (11.x - 13.x).

Note: If you run big3d_install on BIG-IP versions prior to 11.5.0, it is
possible that you may install a vulnerable version of big3d on systems that are
running non-vulnerable versions of the BIG-IP system. In this case, upgrade to
a fixed version or hotfix, and refer to K13312: Overview of the BIG-IP DNS
big3d_install, bigip_add, and gtm_add utilities (11.x - 13.x) for information
about running big3d_install to resolve the issue.

Note: The iquery protocol used by the BIG-IP DNS system (formerly BIG-IP GTM)
also uses port 4353. Ensure that all of the peer devices are included when you
limit connections by IP address.

Supplemental Information

  o K17329: BIG-IP GTM name has changed to BIG-IP DNS
  o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents
  o K4602: Overview of the F5 security vulnerability response policy
  o K4918: Overview of the F5 critical issue hotfix policy
  o K167: Downloading software and firmware from F5
  o K9502: BIG-IP hotfix and point release matrix

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