ESB-2018.2078 - [Appliance] F5 BIG-IP products: Denial of service - Existing account 2018-07-19

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2078
                 K19634255:TMM vulnerability CVE-2018-5535
                               19 July 2018

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

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2018-5533  

Original Bulletin: 
   https://support.f5.com/csp/article/K19634255

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K19634255:TMM vulnerability CVE-2018-5535

Security Advisory

Original Publication Date: 19 Jul, 2018

Security Advisory Description

Specifically crafted HTTP responses, when processed by a Virtual Server with
an associated QoE profile that has Video enabled, may cause TMM to incorrectly
buffer response data causing the TMM to restart resulting in a Denial of
Service. (CVE-2018-5535)

Impact

The vulnerability allows remote attackers to cause a denial of service (DoS)
on the BIG-IP system.

Security Advisory Status

F5 Product Development has assigned ID 722372 and ID 722407 (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|          |           |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|BIG-IP (LTM, AAM,|13.x  |13.0.0 -  |None      |           |      |          |
|AFM, Analytics,  |      |13.1.0    |          |           |      |TMM       |
|APM, ASM, DNS,   +------+----------+----------+           |      |(virtual  |
|Edge Gateway,    |12.x  |12.1.0 -  |None      |High       |7.5   |server    |
|FPS, GTM, Link   |      |12.1.3    |          |           |      |with QoE  |
|Controller, PEM, +------+----------+----------+           |      |profile)  |
|WebAccelerator)  |11.x  |11.2.1 -  |None      |           |      |          |
|                 |      |11.6.3    |          |           |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|ARX              |6.x   |None      |Not       |Not        |None  |None      |
|                 |      |          |applicable|vulnerable |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|Enterprise       |      |          |Not       |Not        |      |          |
|Manager          |3.x   |None      |applicable|vulnerable^|None  |None      |
|                 |      |          |          |2          |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|                 |6.x   |None      |Not       |           |      |          |
|                 |      |          |applicable|           |      |          |
|BIG-IQ           +------+----------+----------+Not        |      |          |
|Centralized      |5.x   |None      |Not       |vulnerable^|None  |None      |
|Management       |      |          |applicable|2          |      |          |
|                 +------+----------+----------+           |      |          |
|                 |4.x   |None      |Not       |           |      |          |
|                 |      |          |applicable|           |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|BIG-IQ Cloud and |      |          |Not       |Not        |      |          |
|Orchestration    |1.x   |None      |applicable|vulnerable^|None  |None      |
|                 |      |          |          |2          |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|                 |      |          |Not       |Not        |      |          |
|F5 iWorkflow     |2.x   |None      |applicable|vulnerable^|None  |None      |
|                 |      |          |          |2          |      |          |
+-----------------+------+----------+----------+-----------+------+----------+
|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 CVSSv3 score link takes you to a resource outside of AskF5, and it is
possible that the document may be removed without our knowledge.

^2 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.

Mitigation

Mitigation is limited to simply removing the QoE profile from the virtual
server.


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 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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