ESB-2018.0253.5 - UPDATE [Appliance] F5 BIG-IP products: Denial of service - Remote/unauthenticated 2018-08-14

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             AUSCERT External Security Bulletin Redistribution

         A vulnerability has been identified in F5 BIG-IP products
                              14 August 2018


        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-2017-3145  

Reference:         ESB-2018.0220

Original Bulletin:

Revision History:  August  14 2018: Updated security advisory status table.
                   June    19 2018: Fixes added for BIG-IP 11.6.2-11.6.3
                   April   19 2018: Fixes added for BIG-IP
                   March   27 2018: Initial fix released
                   January 24 2018: Initial Release

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K08613310:BIND vulnerability CVE-2017-3145

Security Advisory

Original Publication Date: 24 Jan, 2018

Latest   Publication Date: 14 Aug, 2018

Security Advisory Description

BIND was improperly sequencing cleanup operations on upstream recursion fetch
contexts, leading in some cases to a use-after-free error that can trigger an
assertion failure and crash in named. (CVE-2017-3145)



A remote attacker can use this flaw to make named, acting as a Domain Name
System Security Extensions (DNSSEC) validating resolver, exit unexpectedly
with an assertion failure by way of a specially crafted DNS request.

This vulnerability affects BIND only when configured as a recursive resolver
with DNSSEC validation enabled. That mode of operation is not present in any
default configuration but can be enabled.

ARX, Enterprise Manager, BIG-IQ, F5 iWorkflow, LineRate, and Traffix

There is no impact; these F5 products are not affected by this vulnerability.

Security Advisory Status

F5 Product Development has assigned ID 701359 (BIG-IP) to this vulnerability.
Additionally, BIG-IP iHealth may list Heuristic H08613310 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|          |          |      |          |
|BIG-IP (LTM, AAM, |14.x  |None      |14.0.0    |          |      |          |
|AFM, Analytics,   +------+----------+----------+          |      |          |
|APM, ASM, DNS,    |13.x  |13.1.0    |  |          |      |          |
|Edge Gateway,     |      |          |13.0.1    |          |      |          |
|GTM, Link         +------+----------+----------+Medium    |5.3   |BIND      |
|Controller, PEM,  |12.x  |12.1.3    |  |          |      |          |
|WebAccelerator,   +------+----------+----------+          |      |          |
|WebSafe)          |11.x  |11.6.2 -  |  |          |      |          |
|                  |      |11.6.3    |          |          |      |          |
|ARX               |6.x   |None      |Not       |Not       |None  |None      |
|                  |      |          |applicable|vulnerable|      |          |
|Enterprise Manager|3.x   |None      |Not       |Not       |None  |None      |
|                  |      |          |applicable|vulnerable|      |          |
|BIG-IQ (Cloud,    |      |          |Not       |Not       |      |          |
|Device, Security, |4.x   |None      |applicable|vulnerable|None  |None      |
|ADC)              |      |          |          |          |      |          |
|                  |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.

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.


If you require DNSSEC validation, there is no mitigation for this issue.
However, if you have manually enabled the DNSSEC validation feature in the
BIND configuration but do not require DNSSEC validation, you can mitigate this
vulnerability by disabling/removing this feature in/from the BIND
configuration. For more information about BIND's DNSSEC validation, refer to
the official BIND DNSSEC Guide from Internet Systems Consortium (ISC).

Note: The previous link takes you to a resource outside of AskF5. The third
party could remove the document without our knowledge.

Supplemental Information

  o K51812227: Understanding Security Advisory versioning
  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

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