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             AUSCERT External Security Bulletin Redistribution

                              ESB-2017.3256.2
           Memory leak in Linux kernel affects F5 BIG-IP 13.0.0
                               12 March 2018

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

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

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
                   Virtualisation
                   Linux variants
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6135  

Original Bulletin: 
   https://support.f5.com/csp/article/K43322910

Comment: This advisory references vulnerabilities in the Linux kernel that 
         also affect distributions other than F5 BIG-IP products. It is
         recommended that administrators running Linux check for an updated
         version of the kernel for their system.

Revision History:  March    12 2018: Updated source text with detection heuristic
				     and affected versions
                   December 21 2017: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

K43322910: Linux kernel vulnerability CVE-2017-6135

Security Advisory

Original Publication Date: Dec 21, 2017
Updated Date: Mar 10, 2018

Security Advisory Description

A slow memory leak as a result of undisclosed IPv4 or IPv6 packets sent to
BIG-IP management port or self IP addresses may lead to out of memory (OOM)
conditions. (CVE-2017-6135)

Impact

An unauthenticated remote attacker may be able to exhaust BIG-IP memory
resources and cause a denial of service (DoS) with maliciously crafted network
traffic.

Security Advisory Status

F5 Product Development has assigned IDs 658764 and 660725 (BIG-IP) to this
vulnerability. Additionally, BIG-IP iHealth may list Heuristic H43322910 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|          |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|BIG-IP (LTM, AAM,  |13.x  |13.0.0    |13.1.0    |          |      |          |
|AFM, Analytics,    |------+----------+----------|          |      |          |
|APM, ASM, DNS,     |12.x  |None      |Not       |          |      |Linux     |
|GTM, Link          |      |          |applicable|High      |7.5   |kernel    |
|Controller, PEM,   |------+----------+----------|          |      |          |
|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|      |          |
|-------------------+------+----------+----------+----------+------+----------|
|BIG-IQ (Cloud,     |      |          |Not       |Not       |      |          |
|Device, Security,  |4.x   |None      |applicable|vulnerable|None  |None      |
|ADC)               |      |          |          |          |      |          |
|-------------------+------+----------+----------+----------+------+----------|
|                   |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|          |      |          |
+-----------------------------------------------------------------------------+

^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.

Note: For details about how Security Advisory articles are versioned, and what
versions are listed in the table, refer to K51812227: Understanding Security
Advisory versioning.

Mitigation

To mitigate this vulnerability, you should permit management access to F5
products only over a secure network and restrict command line access for
affected systems to trusted users. For more information, refer to K13309:
Restricting access to the Configuration utility by source IP address (11.x -
13.x) and K13092: Overview of securing access to the BIG-IP system.

Additionally, for BIG-IP AFM systems, you can use iptables firewall rules to
limit management access to trusted sources.

- --------------------------END INCLUDED TEXT--------------------

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