ESB-2018.1349 - [Appliance] F5 Big-IP products: Denial of service - Existing account 2018-05-03

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1349
                    RADIUS authentication vulnerability
                                3 May 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:        Patch/Upgrade
CVE Names:         CVE-2018-5515  

Original Bulletin: 
   https://support.f5.com/csp/article/K62750376

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K62750376: RADIUS authentication vulnerability CVE-2018-5515

Security Advisory  

Original Publication Date: May 01, 2018

Security Advisory Description

Using RADIUS authentication responses from a RADIUS server with IPv6 addresses
may cause TMM to crash, leading to a failover event. (CVE-2018-5515)

Impact

BIG-IP

When a BIG-IP system receives a RADIUS authentication response from a IPv6
RADIUS server, the affected system produces a Traffic Management Microkernel
(TMM) core file and restarts TMM, resulting in a failover event. This
vulnerability affects only BIG-IP systems configured with RADIUS authentication
for BIG-IP administrative users.

BIG-IQ / F5 iWorkflow / Enterprise Manager / ARX / LineRate / Traffix SDC

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

Security Advisory Status

F5 Product Development has assigned ID 706086 (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        |          |1     |feature       |
|               |      |vulnerable|          |          |      |              |
+---------------+------+----------+----------+----------+------+--------------+
|BIG-IP (LTM,   |      |13.0.0 -  |          |          |      |              |
|AAM, AFM,      |13.x  |13.1.0    |13.1.0.6  |          |      |              |
|Analytics, APM,|      |          |          |          |      |              |
|ASM, DNS, Edge +------+----------+----------+          |      |RADIUS auth   |
|Gateway, GTM,  |      |          |Not       |          |      |for BIG-IP    |
|Link           |12.x  |None      |applicable|Medium    |4.4   |administrative|
|Controller,    |      |          |          |          |      |users         |
|PEM,           +------+----------+----------+          |      |              |
|WebAccelerator,|      |          |Not       |          |      |              |
|WebSafe)       |11.x  |None      |applicable|          |      |              |
|               |      |          |          |          |      |              |
+---------------+------+----------+----------+----------+------+--------------+
|ARX            |6.x   |None      |Not       |Not       |None  |None          |
|               |      |          |applicable|vulnerable|      |              |
+---------------+------+----------+----------+----------+------+--------------+
|Enterprise     |3.x   |None      |Not       |Not       |None  |None          |
|Manager        |      |          |applicable|vulnerable|      |              |
+---------------+------+----------+----------+----------+------+--------------+
|               |5.x   |None      |Not       |          |      |              |
|BIG-IQ         |      |          |applicable|Not       |      |              |
|Centralized    +------+----------+----------+vulnerable|None  |None          |
|Management     |4.x   |None      |Not       |          |      |              |
|               |      |          |applicable|          |      |              |
+---------------+------+----------+----------+----------+------+--------------+
|BIG-IQ Cloud   |      |          |Not       |Not       |      |              |
|and            |1.x   |None      |applicable|vulnerable|None  |None          |
|Orchestration  |      |          |          |          |      |              |
+---------------+------+----------+----------+----------+------+--------------+
|F5 iWorkflow   |2.x   |None      |Not       |Not       |None  |None          |
|               |      |          |applicable|vulnerable|      |              |
+---------------+------+----------+----------+----------+------+--------------+
|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|          |      |              |
+---------------+------+----------+----------+----------+------+--------------+

^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.

^2The 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

To mitigate this vulnerability, you should ensure that the BIG-IP system
authenticates with a trusted and secure RADIUS 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 K9502: BIG-IP hotfix and point release matrix
  o K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
  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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