ESB-2017.2825 - [Linux][Appliance] F5 products: Increased privileges - Existing account 2017-11-06

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

                               ESB-2017.2825
            K05513373: Linux kernel vulnerability CVE-2016-9576
                              6 November 2017

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

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

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
                   Linux variants
Impact/Access:     Increased Privileges -- Existing Account
                   Denial of Service    -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-9576  

Reference:         ESB-2017.2789
                   ESB-2017.2233
                   ESB-2017.1890
                   ESB-2017.1872
                   ESB-2017.1039
                   ESB-2017.0757

Original Bulletin: 
   https://support.f5.com/csp/article/K05513373

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K05513373: Linux kernel vulnerability CVE-2016-9576

Security Advisory

Original Publication Date: Jan 28, 2017
Updated Date: Nov 03, 2017

Applies to (see versions):

  o Product: BIG-IQ, BIG-IQ Cloud, BIG-IQ Device, BIG-IQ Security, BIG-IQ ADC,
    BIG-IQ Centralized Management
      - 5.3.0, 5.2.0, 5.1.0, 5.0.0, 4.6.0, 4.5.0, 4.4.0, 4.3.0, 4.2.0, 4.1.0,
        4.0.0
  o Product: BIG-IP, BIG-IP AAM, BIG-IP AFM, BIG-IP Analytics, BIG-IP APM,
    BIG-IP ASM, BIG-IP DNS, BIG-IP Edge Gateway, BIG-IP GTM, BIG-IP Link
    Controller, BIG-IP LTM, BIG-IP PEM, BIG-IP PSM, BIG-IP WebAccelerator
      - 13.0.0, 12.1.2, 12.1.1, 12.1.0, 12.0.0, 11.6.2, 11.6.1, 11.6.0, 11.5.5,
        11.5.4, 11.5.3, 11.5.2, 11.5.1, 11.5.0, 11.4.1, 11.4.0, 11.2.1
  o Product: Enterprise Manager
      - 3.1.1
  o Product: F5 iWorkflow
      - 2.3.0, 2.2.0, 2.1.0, 2.0.2, 2.0.1, 2.0.0
  o Product: LineRate
      - 2.6.1, 2.6.0, 2.5.2, 2.5.1, 2.5.0
  o Product: ARX, ARX
      - 6.4.0, 6.3.0, 6.2.0
  o Product: F5 WebSafe
      - 1.0.0
  o Product: Traffix SDC
      - 5.1.0, 4.4.0, 4.0.5, 4.0.2, 4.0.0
  o Product: BIG-IQ Cloud and Orchestration
      - 1.0.0

Security Advisory Description

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before
4.8.14 does not properly restrict the type of iterator, which allows local
users to read or write to arbitrary kernel memory locations or cause a denial
of service (use-after-free) by leveraging access to a /dev/sg device. (
CVE-2016-9576)

Impact

This vulnerability may allow locally authenticated users to read or write to
arbitrary kernel memory locations or cause a denial-of-service (DoS).

Note: The exploit requires local shell access and can provide a user with root
access to the system. On BIG-IP systems, shell access includes root privileges,
making this exploit unnecessary.

Security Advisory Status

F5 Product Development has assigned ID 640766 and 640768 (BIG-IP), and ID
640766 and 640768 (BIG-IQ, Enterprise Manager, iWorkflow) to this
vulnerability. Additionally, BIG-IP iHealth may list Heuristic H05513373 on the
Diagnostics > Identified > Low screen.

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 to|          |Vulnerable      |
|Product        |to be vulnerable|be not vulnerable|Severity  |component or    |
|               |                |                 |          |feature         |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP LTM     |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|               |11.4.0 - 11.6.1 |                 |          |                |
|               |11.2.1          |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP AAM     |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|               |11.4.0 - 11.6.1 |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP AFM     |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|               |11.4.0 - 11.6.1 |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP         |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|Analytics      |11.4.0 - 11.6.1 |                 |          |                |
|               |11.2.1          |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP APM     |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|               |11.4.0 - 11.6.1 |                 |          |                |
|               |11.2.1          |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP ASM     |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|               |11.4.0 - 11.6.1 |                 |          |                |
|               |11.2.1          |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP DNS     |13.0.0          |None             |Low       |Linux kernel    |
|               |12.0.0 - 12.1.2 |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Edge    |11.2.1          |None             |Low       |Linux kernel    |
|Gateway        |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP GTM     |11.4.0 - 11.6.1 |11.6.2           |Low       |Linux kernel    |
|               |11.2.1          |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP Link    |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|Controller     |11.4.0 - 11.6.1 |                 |          |                |
|               |11.2.1          |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |          |                |
|BIG-IP PEM     |12.0.0 - 12.1.2 |11.6.2           |Low       |Linux kernel    |
|               |11.4.0 - 11.6.1 |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP PSM     |11.4.0 - 11.4.1 |None             |Low       |Linux kernel    |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP         |11.2.1          |None             |Low       |Linux kernel    |
|WebAccelerator |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |                 |Low       |                |
|BIG-IP WebSafe |12.0.0 - 12.1.2 |11.6.2           |          |Linux kernel    |
|               |11.6.0 - 11.6.1 |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|ARX            |None            |6.2.0 - 6.4.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Enterprise     |3.1.1           |None             |Low       |Linux kernel    |
|Manager        |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |4.0.0 - 4.5.0   |None             |Low       |Linux kernel    |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Device  |4.2.0 - 4.5.0   |None             |Low       |Linux kernel    |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Security|4.0.0 - 4.5.0   |None             |Low       |Linux kernel    |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ ADC     |4.5.0           |None             |Low       |Linux kernel    |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ         |5.0.0 - 5.3.0   |                 |          |                |
|Centralized    |4.6.0           |None             |Low       |Linux kernel    |
|Management     |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |                |                 |          |                |
|and            |1.0.0           |None             |Low       |Linux kernel    |
|Orchestration  |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|F5 iWorkflow   |2.0.0 - 2.3.0   |None             |Low       |Linux kernel    |
+---------------+----------------+-----------------+----------+----------------+
|LineRate       |None            |3.0.0 - 3.1.1    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Traffix SDC    |5.0.0 - 5.1.0   |None             |Low       |Linux Kernel    |
|               |4.0.0 - 4.4.0   |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+

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.

To determine the necessary upgrade path for your BIG-IQ system, you should
understand the BIG-IQ product offering name changes. For more information,
refer to K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems
.

Supplemental Information

  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 K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
  o K9502: BIG-IP hotfix matrix
  o K15106: Managing BIG-IQ product hotfixes
  o K15113: BIG-IQ hotfix matrix

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