ESB-2018.0596.2 - UPDATE [Appliance] F5 BIG-IP Products: Denial of service - Remote/unauthenticated 2018-04-18

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.0596.2
       K44200194: DNS TCP virtual server vulnerability CVE-2018-5501
                               18 April 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/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5501  

Original Bulletin: 
   https://support.f5.com/csp/article/K44200194

Revision History:  April 18 2018: Updated affected versions.
                   March  1 2018: Initial Release

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K44200194: DNS TCP virtual server vulnerability CVE-2018-5501

Security Advisory

Original Publication Date: Mar 01, 2018
Updated Date: Apr 18, 2018

Security Advisory Description

In some circumstances TCP DNS profile allows excessive buffering due to lack of
flow control. (CVE-2018-5501)

Impact

The affected BIG-IP system may experience performance degradation or
denial-of-service (DoS) in the worst-case scenario when the vulnerability is
exploited.

Security Advisory Status

F5 Product Development has assigned ID 652848 (BIG-IP) to this vulnerability.
Additionally, BIG-IP iHealth may list Heuristic H44200194 on the Diagnostics >
Identified > Medium 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.

+-----------------------------------------------------------------------------+
|                   |      |Versions  |Fixes     |          |CVSSv3|Vulnerable|
|Product            |Branch|known to  |introduced|Severity  |score^|component |
|                   |      |be        |in        |          |1     |or feature|
|                   |      |vulnerable|          |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|                   |13.x  |13.0.0    |13.1.0    |          |      |          |
|BIG-IP (LTM, AAM,  |------+----------+----------|          |      |Virtual   |
|AFM, Analytics,    |12.x  |12.1.0 -  |12.1.3.2  |          |      |server    |
|APM, ASM, DNS, Edge|      |12.1.3    |          |          |      |associated|
|Gateway, GTM, Link |------+----------+----------|Medium    |5.9   |with both |
|Controller, PEM,   |      |11.6.1 -  |          |          |      |TCP and   |
|WebAccelerator,    |      |11.6.x^2  |          |          |      |DNS       |
|WebSafe)           |11.x  |11.5.1 -  |None      |          |      |profiles  |
|                   |      |11.5.x^2  |          |          |      |          |
|                   |      |11.2.1    |          |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|-------------------+------+----------+----------+----------+------+----------|
|Enterprise Manager |3.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|-------------------+------+----------+----------+----------+------+----------|
|                   |5.x   |None      |Not       |          |      |          |
|BIG-IQ Centralized |      |          |applicable|Not       |      |          |
|Management         |------+----------+----------|vulnerable|None  |None      |
|                   |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|      |          |
|-------------------+------+----------+----------+----------+------+----------|
|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.

^2Due to the risks involved in back porting the fix to the 11.5.x and 11.6.x
release branches, F5 Product Development has determined that it is not feasible
to do so. As a result, a fix will not be available for these branches. For
customers who require this fix, F5 recommends that you upgrade to a branch that
has releases listed in the Fixes introduced in column in the status table.

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.

Note: For details about how Security Advisory articles are versioned, and what
versions are listed in the table, refer to K51812227: Understanding Security
Advisory versioning.

Mitigation

None

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