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             AUSCERT External Security Bulletin Redistribution

          K19855851: Intel SPI Flash vulnerability CVE-2017-5703
                             21 December 2018


        AusCERT Security Bulletin Summary

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5703  

Reference:         ESB-2018.2202

Original Bulletin: 

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K19855851: Intel SPI Flash vulnerability CVE-2017-5703

Security Advisory

Original Publication Date: Dec 20, 2018

Applies to (see versions):

  o Product: BIG-IQ, BIG-IQ Centralized Management
      o 6.1.0, 6.0.1, 6.0.0, 5.4.0, 5.3.0, 5.2.0, 5.1.0, 5.0.0
  o Product: BIG-IP, BIG-IP AAM, BIG-IP AFM, BIG-IP Analytics, BIG-IP APM,
    Link Controller, BIG-IP LTM, BIG-IP PEM, BIG-IP WebAccelerator
      o 14.1.0, 14.0.0, 13.1.1, 13.1.0, 13.0.1, 13.0.0, 12.1.3, 12.1.2, 12.1.1,
        12.1.0, 11.6.3, 11.6.2, 11.6.1, 11.5.7, 11.5.6, 11.5.5, 11.5.4, 11.5.3,
        11.5.2, 11.5.1, 11.2.1
  o Product: Enterprise Manager
      o 3.1.1
  o Product: F5 iWorkflow
      o 2.3.0
  o Product: Traffix SDC
      o 5.1.0, 5.0.0, 4.4.0

Security Advisory Description

Configuration of SPI Flash in platforms based on multiple Intel platforms allow
a local attacker to alter the behavior of the SPI flash potentially leading to
a Denial of Service. (CVE-2017-5703)



A local attacker can alter the behavior of the SPI Flash memory, potentially
leading to a denial of service (DoS).

BIG-IQ, Enterprise Manager, F5 iWorkflow, and Traffix SDC

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

Security Advisory Status

F5 Product Development has assigned ID 715969 (BIG-IP) 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 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|          |          |      |          |
|                   |14.x  |14.0.0    |14.1.0    |          |      |          |
|BIG-IP (LTM, AAM,  +------+----------+----------+          |      |          |
|AFM, Analytics,    |13.x  |13.0.0 -  |None      |          |      |Intel SPI |
|APM, ASM, DNS, Edge|      |13.1.1    |          |          |      |Flash on  |
|Gateway, FPS, GTM, +------+----------+----------+Medium    |6.1   |certain F5|
|Link Controller,   |12.x  |12.1.0 -  |None      |          |      |hardware  |
|PEM,               |      |12.1.3    |          |          |      |platforms*|
|WebAccelerator)    +------+----------+----------+          |      |          |
|                   |11.x  |11.2.1 -  |None      |          |      |          |
|                   |      |11.6.3    |          |          |      |          |
|Enterprise Manager |3.x   |None      |None      |Not       |None  |None      |
|                   |      |          |          |vulnerable|      |          |
|                   |6.x   |None      |Not       |          |      |          |
|BIG-IQ Centralized |      |          |applicable|Not       |      |          |
|Management         +------+----------+----------+vulnerable|None  |None      |
|                   |5.x   |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|F5 iWorkflow       |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.

*The Intel SPI Flash component on the following F5 hardware platforms are

  o BIG-IP appliances: i850 (C117), i2x00 (C117), i4x00 (C115), i5820-DF
    (C125), i5x00 (C119), i7820-DF (C126), i7x00 (C118), i10x00 (C116),
    i11x00-DS (C124), i11x00 (C123), i15x00 (D116)
  o VIPRION blade: B4450 (A114)

For the supported BIG-IP software versions for each hardware platforms, refer
to K9476: The F5 hardware/software compatibility matrix.

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.

The following table lists the BIOS versions for each hardware platform that
includes the fix in the BIG-IP 14.1.0 release.

|Hardware platforms                                       |BIOS version that  |
|                                                         |includes the fix   |
|i850 (C117), i2x00 (C117), i4x00 (C115)                  |         |
|i5820-DF (C125), i5x00 (C119), i7820-DF (C126), i7x00    |         |
|(C118), i10x00 (C116), i11x00-DS (C124), i11x00 (C123)   |                   |
|i15x00 (D116)                                            |         |
|VIPRION blade B4450 (A114)                               |         |

To determine the BIOS version on your BIG-IP platform, type the following

tmsh show /sys hardware | grep -i BIOS



Supplemental Information

  o K51812227: Understanding Security Advisory versioning
  o K41942608: Overview of Security Advisory articles
  o K4602: Overview of the F5 security vulnerability response policy
  o K4918: Overview of the F5 critical issue hotfix policy
  o K9502: BIG-IP hotfix and point release matrix
  o K167: Downloading software and firmware from F5
  o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents

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