ESB-2018.1898 - [Appliance] F5 BIG-IP products: Denial of service - Remote with user interaction 2018-06-29

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1898
                     DoS patched in F5 BIG-IP products
                               29 June 2018

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

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5732  

Original Bulletin: 
   https://support.f5.com/csp/article/K08306700

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

K08306700: DHCP client vulnerability CVE-2018-5732

Security Advisory

Original Publication Date: Mar 20, 2018
Updated Date: Jun 29, 2018

Security Advisory Description

An out-of-bound memory access flaw was found in the way dhclient processed a
DHCP response packet. A malicious DHCP server could potentially use this flaw
to crash dhclient processes running on DHCP client machines via a crafted DHCP
response packet. (CVE-2018-5732)

Impact

An attacker can cause a denial of service (DoS) of DHCP functionality on the F5
product management interface.

Security Advisory Status

F5 Product Development has assigned ID 709688 (BIG-IP), ID 710560 (BIG-IQ), and
ID 710557 (Enterprise Manager) to this vulnerability. Additionally, BIG-IP
iHealth may list Heuristic H08306700 on the Diagnostics > Identified > High
page.

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|          |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|BIG-IP (LTM, AAM,  |13.x  |13.0.0 -  |13.1.0.8  |          |      |          |
|AFM, Analytics,    |      |13.1.0    |          |          |      |          |
|APM, ASM, DNS, Edge|------+----------+----------|          |      |dhclient  |
|Gateway, GTM, Link |12.x  |12.1.0 -  |None      |High      |7.5   |(DHCP on  |
|Controller, PEM,   |      |12.1.3    |          |          |      |the MGMT  |
|WebAccelerator,    |------+----------+----------|          |      |interface)|
|WebSafe)           |11.x  |11.2.1 -  |None      |          |      |          |
|                   |      |11.6.3    |          |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|-------------------+------+----------+----------+----------+------+----------|
|                   |      |          |          |          |      |dhclient  |
|Enterprise Manager |3.x   |3.1.1     |None      |High      |7.5   |(DHCP on  |
|                   |      |          |          |          |      |the MGMT  |
|                   |      |          |          |          |      |interface)|
|-------------------+------+----------+----------+----------+------+----------|
|                   |5.x   |5.0.0 -   |None      |          |      |          |
|BIG-IQ Centralized |      |5.4.0     |          |High      |7.5   |None      |
|Management         |------+----------+----------|          |      |          |
|                   |4.x   |4.6.0     |None      |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|                   |      |          |          |          |      |dhclient  |
|BIG-IQ Cloud and   |1.x   |1.0.0     |None      |High      |7.5   |(DHCP on  |
|Orchestration      |      |          |          |          |      |the MGMT  |
|                   |      |          |          |          |      |interface)|
|-------------------+------+----------+----------+----------+------+----------|
|                   |      |          |          |          |      |dhclient  |
|F5 iWorkflow       |2.x   |2.0.1 -   |None      |High      |7.5   |(DHCP on  |
|                   |      |2.3.0     |          |          |      |the MGMT  |
|                   |      |          |          |          |      |interface)|
|-------------------+------+----------+----------+----------+------+----------|
|LineRate           |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

None

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