ESB-2019.0584 - [Appliance] F5 BIG-IP products: Access privileged data - Remote/unauthenticated 2019-02-26

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0584
            TMM TLS virtual server vulnerability CVE-2019-6593
                             26 February 2019

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

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6593  

Original Bulletin: 
   https://support.f5.com/csp/article/K10065173

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K10065173:TMM TLS virtual server vulnerability CVE-2019-6593 

Security Advisory

Original Publication Date: 26 Feb, 2019

Security Advisory Description

A BIG-IP virtual server configured with a Client SSL profile may be vulnerable
to a chosen ciphertext attack against CBC ciphers. When exploited, this may
result in plaintext recovery of encrypted messages through a man-in-the-middle
(MITM) attack, despite the attacker not having gained access to the server's
private key itself. (CVE-2019-6593 also known as Zombie POODLE and
GOLDENDOODLE)

Impact

Exploiting this vulnerability to perform plaintext recovery of encrypted data
may reveal session authentication cookies similar to CVE-2014-3566 (POODLE).
Only TLS sessions established using CBC mode encryption are vulnerable to this
attack.

To exploit this vulnerability, the attacker must have a privileged network
position to intercept controlled HTTPS requests, which are generally initiated
via JavaScript originating in any browser context.

Security Advisory Status

F5 Product Development has assigned ID 580596 (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|          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |14.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|                   +------+----------+----------+          |      |          |
|BIG-IP (LTM, AAM,  |13.x  |None      |Not       |          |      |          |
|AFM, Analytics,    |      |          |applicable|          |      |          |
|APM, ASM, DNS, Edge+------+----------+----------+          |      |          |
|Gateway, FPS, GTM, |12.x  |12.1.0    |12.1.1    |Medium    |5.9   |TMM       |
|Link Controller,   |      |          |12.1.0 HF1|          |      |          |
|PEM,               +------+----------+----------+          |      |          |
|WebAccelerator)    |      |11.6.1    |11.6.2    |          |      |          |
|                   |11.x  |11.5.1 -  |11.6.1 HF1|          |      |          |
|                   |      |11.5.4    |11.5.5    |          |      |          |
|                   |      |          |11.5.4 HF2|          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|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|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |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.

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

Acknowledgements

F5 would like to acknowledge Craig Young of Tripwire VERT for bringing this
issue to our attention and for following the highest standards of responsible
disclosure.

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
  o K39508724: TMM SSL/TLS virtual server vulnerability CVE-2016-6907

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