ESB-2018.0866.2 - UPDATE [Appliance] F5 BIG-IP products: Denial of service - Remote/unauthenticated 2018-05-07

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

                              ESB-2018.0866.2
                 K13540723:NTP vulnerability CVE-2018-7184
                                7 May 2018

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

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

Product:           F5 BIG-IP products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2018-7184  

Reference:         ESB-2018.0679

Original Bulletin: 
   https://support.f5.com/csp/article/K13540723

Revision History:  May    7 2018: Heuristic added to detect the vulnerability
                   March 27 2018: Initial Release

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

K13540723:NTP vulnerability CVE-2018-7184

Security Advisory

Original Publication Date: 27 Mar, 2018

Security Advisory Description

ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the
"received" timestamp, which allows remote attackers to cause a denial of
service (disruption) by sending a packet with a zero-origin timestamp causing
the association to reset and setting the contents of the packet as the most
recent timestamp. This issue is a result of an incomplete fix for
CVE-2015-7704. (CVE-2018-7184)

Impact

When network time protocol (NTP) is configured with an unauthenticated peer,
time sources attackers may be able to temporarily disrupt synchronization
between BIG-IP and the peer NTP device by spoofing packets from the peer.


Security Advisory Status

F5 Product Development has assigned ID 709048 (BIG-IP), ID 709180 (BIG-IQ), ID
709179 (Enterprise Manager), and ID CPF-24829, CPF-24830 and CPF-24831 (Traffix
SDC) to this vulnerability. Additionally, BIG-IP iHealth may list Heuristic
H13540723 on the Diagnostics > Identified > Low 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|          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |13.x  |13.0.0 -  |None      |          |      |          |
|                   |      |13.1.0    |          |          |      |          |
|BIG-IP (LTM, AAM,  +------+----------+----------+          |      |          |
|AFM, Analytics,    |12.x  |12.1.0 -  |None      |          |      |          |
|APM, ASM, DNS, Edge|      |12.1.3    |          |          |      |          |
|Gateway, GTM, Link +------+----------+----------+Low       |3.1   |NTP       |
|Controller, PEM,   |      |11.6.1 -  |          |          |      |          |
|WebAccelerator,    |      |11.6.3    |          |          |      |          |
|WebSafe)           |11.x  |11.5.1 -  |None      |          |      |          |
|                   |      |11.5.3    |          |          |      |          |
|                   |      |11.2.1    |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x   |3.1.1     |None      |Low       |3.1   |NTP       |
+-------------------+------+----------+----------+----------+------+----------+
|                   |5.x   |5.0.0 -   |None      |          |      |          |
|BIG-IQ Centralized |      |5.4.0     |          |Low       |3.1   |NTP       |
|Management         +------+----------+----------+          |      |          |
|                   |4.x   |4.6.0     |None      |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IQ Cloud and   |1.x   |1.0.0     |None      |Low       |3.1   |NTP       |
|Orchestration      |      |          |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow       |2.x   |2.0.1 -   |None      |Low       |3.1   |NTP       |
|                   |      |2.3.0     |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+
|LineRate           |2.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
+-------------------+------+----------+----------+----------+------+----------+
|                   |5.x   |5.0.0 -   |None      |          |      |          |
|                   |      |5.1.0     |          |          |      |          |
|Traffix SDC        +------+----------+----------+Low       |3.1   |NTP       |
|                   |4.x   |4.0.5 -   |None      |          |      |          |
|                   |      |4.4.0     |          |          |      |          |
+-------------------+------+----------+----------+----------+------+----------+

^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.

To determine the necessary upgrade path for your BIG-IQ system, you should
understand the BIG-IQ product offering name changes. For more information,
refer to K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems
.

Mitigation

To mitigate this vulnerability, you can use server mode instead of peer mode,
enable peer authentication, configure multiple time sources, and/or restrict
access to the network segments that are used to communicate with the NTP peer
to avoid spoofed traffic.


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 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

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

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=05cy
-----END PGP SIGNATURE-----

« Back to bulletins