ESB-2018.1358 - [Appliance] F5 BIG-IP products: Denial of service - Existing account 2018-05-03

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

                               ESB-2018.1358
                            vCMP vulnerability
                                3 May 2018

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

        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-2018-5518  

Original Bulletin: 
   https://support.f5.com/csp/article/K03165684

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K03165684: vCMP vulnerability CVE-2018-5518

Security Advisory

Original Publication Date: May 01, 2018

Security Advisory Description

Malicious root users with access to a vCMP guest can disrupt service on
adjacent vCMP guests running on the same host. Exploiting this vulnerability
causes the vcmpd process on the adjacent vCMP guest to restart and produce a
core file. This issue is only exploitable on a vCMP guest which is operating in
"host-only" or "bridged" mode. vCMP guests which are "isolated" are not
impacted by this issue and do not provide mechanism to exploit the
vulnerability. Guests which are deployed in Appliance mode may be impacted;
however, the exploit is not possible from an Appliance mode guest. To exploit
this vulnerability, root access on a guest system deployed as "host-only" or
"bridged" mode is required. (CVE-2018-5518)

Impact

This vulnerability allows an authenticated root user on a vCMP guest to disrupt
service on adjacent vCMP guests running on the same host.

Security Advisory Status

F5 Product Development has assigned IDs 589233, 688516, and 693312 (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 |
|                   |      |be        |in        |          |1     |or feature|
|                   |      |vulnerable|          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IP (LTM, AAM,  |13.x  |13.0.0 -  |13.1.0.6  |          |      |          |
|AFM, Analytics,    |      |13.1.0    |          |          |      |          |
|APM, ASM, DNS, Edge+------+----------+----------+          |      |          |
|Gateway, GTM, Link |12.x  |12.0.0 -  |12.1.3.4  | High     |7.4   |vCMP guest|
|Controller, PEM,   |      |12.1.3    |          |          |      |          |
|WebAccelerator,    +------+----------+----------+          |      |          |
|WebSafe)           |11.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |5.x   |None      |Not       |          |      |          |
|BIG-IQ Centralized |      |          |applicable|Not       |      |          |
|Management         +------+----------+----------+vulnerable|None  |None      |
|                   |4.x   |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IQ Cloud and   |1.x   |None      |Not       |Not       |None  |None      |
|Orchestration      |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|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|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+

^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.

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

None

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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