ESB-2017.2358 - [Appliance] F5 Products: Denial of service - Remote/unauthenticated 2017-09-19

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2358
               K43945001: F5 TMM vulnerability CVE-2017-6147
                             19 September 2017

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

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6147  

Original Bulletin: 
   https://support.f5.com/csp/article/K43945001

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K43945001: F5 TMM vulnerability CVE-2017-6147 Security Advisory

Original Publication Date: Sep 16, 2017 
Updated Date: Sep 19, 2017


Security Advisory Description

An undisclosed series of requests may cause TMM to restart, causing an 
interruption of service. Specifically, only BIG-IP Virtual Server with "SSL 
Forward Proxy" setting enabled in both the assigned Client and Server SSL 
profiles deployments are impacted by this issue. Customers with use cases 
which the "SSL Forward Proxy" setup connects to untrusted servers are at 
highest risk while customers with use cases which the "SSL Forward Proxy" 
setup connects to trusted servers have a lower risk. (CVE-2017-6147)

Impact

If the SSL Forward Proxy option is enabled on both the Client and Server SSL 
profile assigned to a BIG-IP virtual server, an attacker may be able to cause
the Traffic Management Microkernel (TMM) to restart, resulting in traffic 
disruption. Security Advisory Status

F5 Product Development has assigned ID 634779 (BIG-IP) to this vulnerability.

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          |12.0.0 - 12.1.2  |          |SSL Forward     |
|BIG-IP LTM     |12.1.2 HF1      |11.4.0 - 11.6.1  |High      |Proxy           |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP AAM     |13.0.0          |12.0.0 - 12.1.2  |High      |SSL Forward     |
|               |12.1.2 HF1      |11.4.0 - 11.6.1  |          |Proxy           |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP AFM     |13.0.0          |12.0.0 - 12.1.2  |High      |SSL Forward     |
|               |12.1.2 HF1      |11.4.0 - 11.6.1  |          |Proxy           |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP         |13.0.0          |12.0.0 - 12.1.2  |          |SSL Forward     |
|Analytics      |12.1.2 HF1      |11.4.0 - 11.6.1  |High      |Proxy           |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0 - 12.1.2  |          |SSL Forward     |
|BIG-IP APM     |12.1.2 HF1      |11.4.0 - 11.6.1  |High      |Proxy           |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|               |13.0.0          |12.0.0 - 12.1.2  |          |SSL Forward     |
|BIG-IP ASM     |12.1.2 HF1      |11.4.0 - 11.6.1  |High      |Proxy           |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP DNS     |13.0.0          |12.0.0 - 12.1.2  |High      |SSL Forward     |
|               |12.1.2 HF1      |                 |          |Proxy           |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Edge    |None            |11.2.1           |Not       |None            |
|Gateway        |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP GTM     |None            |11.4.0 - 11.6.1  |Not       |None            |
|               |                |11.2.1           |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Link    |13.0.0          |12.0.0 - 12.1.2  |          |SSL Forward     |
|Controller     |12.1.2 HF1      |11.4.0 - 11.6.1  |High      |Proxy           |
|               |                |11.2.1           |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP PEM     |13.0.0          |12.0.0 - 12.1.2  |High      |SSL Forward     |
|               |12.1.2 HF1      |11.4.0 - 11.6.1  |          |Proxy           |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP PSM     |None            |None             |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP         |None            |None             |Not       |None            |
|WebAccelerator |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP WebSafe |13.0.0          |12.0.0 - 12.1.2  |High      |SSL Forward     |
|               |12.1.2 HF1      |11.6.0 - 11.6.1  |          |Proxy           |
+---------------+----------------+-----------------+----------+----------------+
|ARX            |None            |6.2.0 - 6.4.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Enterprise     |None            |3.1.1            |Not       |None            |
|Manager        |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |None            |4.4.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Device  |None            |4.4.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Security|None            |4.4.0 - 4.5.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ ADC     |None            |4.5.0            |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ         |                |5.0.0 - 5.2.0    |Not       |                |
|Centralized    |None            |4.6.0            |vulnerable|None            |
|Management     |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud   |                |                 |Not       |                |
|and            |None            |1.0.0            |vulnerable|None            |
|Orchestration  |                |                 |          |                |
+---------------+----------------+-----------------+----------+----------------+
|F5 iWorkflow   |None            |2.0.0 - 2.2.0    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|LineRate       |None            |2.5.0 - 2.6.2    |Not       |None            |
|               |                |                 |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+
|Traffix SDC    |None            |5.0.0 - 5.1.0    |Not       |None            |
|               |                |4.0.0 - 4.4.0    |vulnerable|                |
+---------------+----------------+-----------------+----------+----------------+




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.

This issue has been fixed in an engineering hotfix. To obtain the engineering
hotfix, contact F5 Technical Support and reference this article number and the
associated ID number. Note that engineering hotfixes are intended to resolve a
specific software issue until a suitable minor release, maintenance release, 
or cumulative hotfix rollup release is available that includes the software 
fix. For more information, refer to K8986: F5 software life cycle policy.

Mitigation

None

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