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

                               ESB-2019.2286
         A vulnerability in the Alpine Linux container affects F5
                    BIG-IP Controller for Cloud Foundry
                               25 June 2019

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

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

Product:           F5 BIG-IP Controller for Cloud Foundry
Publisher:         F5 Networks
Operating System:  Virtualisation
                   Network Appliance
Impact/Access:     Root Compromise -- Remote/Unauthenticated
Resolution:        None
CVE Names:         CVE-2019-5021  

Reference:         ASB-2019.0136
                   ESB-2019.1923

Original Bulletin: 
   https://support.f5.com/csp/article/K25551452

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K25551452: Alpine Linux Docker image vulnerability CVE-2019-5021

Security Advisory

Original Publication Date: Jun 25, 2019

Security Advisory Description

Versions of the Official Alpine Linux Docker images (since v3.3) contain a NULL
password for the `root` user. This vulnerability appears to be the result of a
regression introduced in December of 2015. Due to the nature of this issue,
systems deployed using affected versions of the Alpine Linux container which
utilize Linux PAM, or some other mechanism which uses the system shadow file as
an authentication database, may accept a NULL password for the `root` user. (
CVE-2019-5021)

Impact

BIG-IP Controller for Cloud Foundry

An attacker can exploit the vulnerability remotely to gain unauthorized access
to the affected system.

BIG-IP / Enterprise Manager / BIG-IQ Centralized Management / F5 iWorkflow /
Traffix SDC / BIG-IP Controller for Kubernetes / BIG-IP Controller for Marathon
/ F5 IPAM Controller

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

Security Advisory Status

F5 Product Development has assigned ID CONTCNTR-669 (BIG-IP Controller for
Cloud Foundry) 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 Controller for|      |          |          |          |      |Alpine    |
|Cloud Foundry        |1.x   |1.2.1     |None      |Critical  |9.8   |Linux     |
|(cf-bigip-ctlr)      |      |          |          |          |      |container |
+---------------------+------+----------+----------+----------+------+----------+
|F5 IPAM Controller   |0.x   |None      |Not       |Not       |None  |None      |
|(f5-ipam-ctlr)       |      |          |applicable|vulnerable|      |          |
+---------------------+------+----------+----------+----------+------+----------+
|BIG-IP Controller for|      |          |Not       |Not       |      |          |
|Kubernetes           |1.x   |None      |applicable|vulnerable|None  |None      |
|(k8s-bigip-ctlr)     |      |          |          |          |      |          |
+---------------------+------+----------+----------+----------+------+----------+
|BIG-IP Controller for|      |          |Not       |Not       |      |          |
|Marathon             |1.x   |None      |applicable|vulnerable|None  |None      |
|(marathon-bigip-ctlr)|      |          |          |          |      |          |
+---------------------+------+----------+----------+----------+------+----------+
|                     |15.x  |None      |Not       |          |      |          |
|                     |      |          |applicable|          |      |          |
|                     +------+----------+----------+          |      |          |
|                     |14.x  |None      |Not       |          |      |          |
|BIG-IP (LTM, AAM,    |      |          |applicable|          |      |          |
|AFM, Analytics, APM, +------+----------+----------+          |      |          |
|ASM, DNS, Edge       |13.x  |None      |Not       |Not       |None  |None      |
|Gateway, FPS, GTM,   |      |          |applicable|vulnerable|      |          |
|Link Controller, PEM,+------+----------+----------+          |      |          |
|WebAccelerator)      |12.x  |None      |Not       |          |      |          |
|                     |      |          |applicable|          |      |          |
|                     +------+----------+----------+          |      |          |
|                     |11.x  |None      |Not       |          |      |          |
|                     |      |          |applicable|          |      |          |
+---------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager   |3.x   |None      |Not       |Not       |None  |None      |
|                     |      |          |applicable|vulnerable|      |          |
+---------------------+------+----------+----------+----------+------+----------+
|                     |6.x   |None      |Not       |          |      |          |
|BIG-IQ Centralized   |      |          |applicable|Not       |      |          |
|Management           +------+----------+----------+vulnerable|None  |None      |
|                     |5.x   |None      |Not       |          |      |          |
|                     |      |          |applicable|          |      |          |
+---------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow         |2.x   |None      |Not       |Not       |None  |None      |
|                     |      |          |applicable|vulnerable|      |          |
+---------------------+------+----------+----------+----------+------+----------+
|Traffix SDC          |5.x   |None      |Not       |Not       |None  |None      |
|                     |      |          |applicable|vulnerable|      |          |
+---------------------+------+----------+----------+----------+------+----------+

^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.

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 F5 Networks Docker Hub page
    Note: This link takes you to a resource outside of AskF5. The third party
    could remove the document without our knowledge.
  o F5 Cloud Docs
  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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