ESB-2018.0362 - [Appliance] F5 BIG-IP PEM: Denial of service - Existing account 2018-02-06

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0362
           K31404801: F5 BIG-IP TMM vulnerability CVE-2017-6169
                              6 February 2018

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

Product:           F5 BIG-IP PEM
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6169  

Original Bulletin: 
   https://support.f5.com/csp/article/K31404801

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K31404801: F5 BIG-IP TMM vulnerability CVE-2017-6169


Security Advisory Description

A virtual server using the URL categorization feature may cause the Traffic
Management Microkernel (TMM) to produce a core file when it receives malformed
URLs during categorization. (CVE-2017-6169).


Impact

An attacker may be able to disrupt traffic or cause the BIG-IP system to fail
over to another device in the device group.

This vulnerability affects BIG-IP systems with the following configuration:

    The BIG-IP system has Policy Enforcement Manager (PEM) provisioned.
    The URL categorization feature is licensed on the system.
    One or more virtual servers use URL categorization through one of the following:
        An iRule
        A Centralized Policy Matching (CPM) rule.
        A BIG-IP PEM policy.
    One or more virtual servers process malformed URL categorization input.

Note: The URL categorization feature enables you to enforce policies configured
as part of the subscriber profile based on the URL category type; the URL
categorization is obtained by querying an internal repository.


Security Advisory Status

F5 Product Development has assigned ID 648786 (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.


+--------------+------+----------+----------+-----------+------+--------------+
|              |      |Versions  |Fixes     |           |CVSSv3|Vulnerable    |
|Product       |Branch|known to  |introduced|Severity   |Score |component or  |
|              |      |be        |in        |           |      |feature       |
|              |      |vulnerable|          |           |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|              |13.x  |13.0.0    |13.1.0    |           |      |              |
|              |      |          |13.0.0 HF1|           |      |              |
|              +------+----------+----------+           |      |              |
|BIG-IP        |12.x  |12.0.0 -  |12.1.3.1  |           |      |PEM URL       |
|(PEM)         |      |12.1.3    |          |High       |7.5   |categorization|
|              +------+----------+----------+           |      |              |
|              |      |11.6.0 -  |          |           |      |              |
|              |11.x  |11.6.2    |11.6.3    |           |      |              |
|              |      |          |          |           |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|BIG-IP        |13.x  |None      |Not       |           |      |              |
|(LTM, AAM,    |      |          |Applicable|           |      |              |
|AFM,          +------+----------+----------+Not        |      |              |
|Analytics,    |12.x  |None      |Not       |vulnerable^|None  |None          |
|APM, ASM, DNS,|      |          |Applicable|1          |      |              |
|GTM, Link     +------+----------+----------+           |      |              |
|Controller)   |11.x  |None      |Not       |           |      |              |
|              |      |          |Applicable|           |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|ARX           |6.x   |None      |Not       |Not        |None  |None          |
|              |      |          |Applicable|vulnerable |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|Enterprise    |      |          |Not       |Not        |      |              |
|Manager       |3.x   |None      |Applicable|vulnerable^|None  |None          |
|              |      |          |          |1          |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|BIG-IQ        |      |          |          |Not        |      |              |
|(Cloud,       |4.x   |None      |Not       |vulnerable^|None  |None          |
|Device,       |      |          |Applicable|1          |      |              |
|Security, ADC)|      |          |          |           |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|              |5.x   |None      |Not       |           |      |              |
|BIG-IQ        |      |          |Applicable|Not        |      |              |
|Centralized   +------+----------+----------+vulnerable^|None  |None          |
|Management    |4.x   |None      |Not       |1          |      |              |
|              |      |          |Applicable|           |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|BIG-IQ Cloud  |      |          |Not       |Not        |      |              |
|and           |1.x   |None      |Applicable|vulnerable^|None  |None          |
|Orchestration |      |          |          |1          |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|              |      |          |Not       |Not        |      |              |
|F5 iWorkflow  |2.x   |None      |Applicable|vulnerable^|None  |None          |
|              |      |          |          |1          |      |              |
+--------------+------+----------+----------+-----------+------+--------------+
|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|           |      |              |
+--------------+------+----------+----------+-----------+------+--------------+

^1 The specified products contain the affected code. However, F5 identifies the
vulnerability status as Not vulnerable because the attacker cannot exploit the
code in default, standard, or recommended configurations.


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.

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.


Mitigation

None

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