ESB-2018.1892.3 - UPDATE [Appliance] F5 BIG-IP products: Denial of service - Unknown/unspecified 2018-08-14

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.1892.3
         K20134942: SSL Forward Proxy vulnerability CVE-2018-5527
                              14 August 2018

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

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

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Unknown/Unspecified
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5527  

Original Bulletin: 
   https://support.f5.com/csp/article/K20134942

Revision History:  August 14 2018: Updated Security Advisory Status product 
                                   table. 
                   July    3 2018: Heuristic H20134942 has been added to 
                                   detect this.
                   June   28 2018: Initial Release

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K20134942:SSL Forward Proxy vulnerability CVE-2018-5527

Security Advisory

Original Publication Date: 28 Jun, 2018

Latest   Publication Date: 14 Aug, 2018

Security Advisory Description

A remote attacker using undisclosed methods against virtual servers configured
with a Client SSL or Server SSL profile that has the SSL Forward Proxy feature
enabled can force the Traffic Management Microkernel (TMM) to leak memory. As
a result, system memory usage increases over time, which may eventually cause
a decrease in performance or a system reboot due to memory exhaustion. (
CVE-2018-5527)

Impact

This vulnerability allows a remote attacker to disrupt service.


Security Advisory Status

F5 Product Development has assigned ID 710140 (BIG-IP) to this vulnerability.
Additionally, BIG-IP iHealth may list Heuristic H20134942 on the Diagnostics >
Identified > High page.

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|          |          |      |           |
+-----------------+------+----------+----------+----------+------+-----------+
|                 |14.x  |None      |14.0.0    |          |      |           |
|BIG-IP (LTM, AAM,+------+----------+----------+          |      |Virtual    |
|AFM, Analytics,  |13.x  |13.0.0 -  |13.1.0.8  |          |      |servers    |
|APM, ASM, DNS,   |      |13.1.0    |          |          |      |using an   |
|Edge Gateway,    +------+----------+----------+High      |7.5   |SSL profile|
|GTM, Link        |12.x  |None      |Not       |          |      |that has   |
|Controller, PEM, |      |          |applicable|          |      |SSL Forward|
|WebAccelerator,  +------+----------+----------+          |      |Proxy      |
|WebSafe)         |11.x  |None      |Not       |          |      |enabled    |
|                 |      |          |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 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|          |      |           |
+-----------------+------+----------+----------+----------+------+-----------+

^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 K14783: Overview of the Client SSL profile (11.x - 13.x)
  o K14806: Overview of the Server SSL profile (11.x - 13.x)
  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 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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