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             AUSCERT External Security Bulletin Redistribution

               sol03331206: NTP vulnerability CVE-2016-4955
                               16 June 2016


        AusCERT Security Bulletin Summary

Product:           F5 BIG-IP products
                   F5 Enterprise Manager
                   F5 BIG-IQ products
                   F5 iWorkflow
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2016-4955  

Reference:         ESB-2016.1411

Original Bulletin: 

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sol03331206: NTP vulnerability CVE-2016-4955

Security Advisory

Original Publication Date: 06/15/2016

Vulnerability Description

** RESERVED ** This candidate has been reserved by an organization or 
individual that will use it when announcing a new security problem. When the 
candidate has been publicized, the details for this candidate will be 
provided. (CVE-2016-4955)


The NTP service may be disrupted.

Security Issue Status

F5 Product Development has assigned ID 597010 (BIG-IP), ID 598184 (BIG-IQ), 
and ID 598186 (Enterprise Manager) to this vulnerability.

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 

Product                         Versions known to be vulnerable    Versions known to be not vulnerable    Severity        Vulnerable component or feature
BIG-IP LTM                      12.0.0 - 12.1.0                    None                                   Low             ntp
                                11.4.0 - 11.6.1
				10.2.1 - 10.2.4
BIG-IP AAM                      12.0.0 - 12.1.0                    None                                   Low             ntp
                                11.4.0 - 11.6.1
BIG-IP AFM                      12.0.0 - 12.1.0                                                           Low             ntp
                                11.4.0 - 11.6.1                    None
BIG-IP Analytics                12.0.0 - 12.1.0                                                           Low             ntp
                                11.4.0 - 11.6.1                    None
BIG-IP APM                      12.0.0 - 12.1.0                                                           Low             ntp
                                11.4.0 - 11.6.1                    None
				10.2.1 - 10.2.4
BIG-IP ASM                      12.0.0 - 12.1.0                                                           Low             ntp
                                11.4.0 - 11.6.1                    None
				10.2.1 - 10.2.4
BIG-IP DNS                      12.0.0 - 12.1.0                    None                                   Low             ntp
BIG-IP Edge Gateway             11.2.1                             None                                   Low             ntp
                                10.2.1 - 10.2.4
BIG-IP GTM                      11.4.0 - 11.6.1                    None                                   Low             ntp
				10.2.1 - 10.2.4
BIG-IP Link Controller          12.0.0 - 12.1.0                    None                                   Low             ntp
                                11.4.0 - 11.6.1
				10.2.1 - 10.2.4
BIG-IP PEM                      12.0.0 - 12.1.0                    None                                   Low             ntp
                                11.4.0 - 11.6.1
BIG-IP PSM                      11.4.0 - 11.4.1                    None                                   Low             ntp
                                10.2.1 - 10.2.4
BIG-IP WebAccelerator           11.2.1                             None                                   Low             ntp
                                10.2.1 - 10.2.4
BIG-IP WOM                      11.2.1                             None                                   Low             ntp
                                10.2.1 - 10.2.4
ARX                             None                               6.2.0 - 6.4.0                          Not vulnerable  None
Enterprise Manager              3.1.1                              None                                   Low             ntp
FirePass                        None                               7.0.0                                  Not vulnerable  None
BIG-IQ Cloud                    4.0.0 - 4.5.0                      None                                   Low             ntp
BIG-IQ Device                   4.2.0 - 4.5.0                      None                                   Low             ntp
BIG-IQ Security                 4.0.0 - 4.5.0                      None                                   Low             ntp
BIG-IQ ADC                      4.5.0                              None                                   Low             ntp
BIG-IQ Centralized Management   5.0.0                              None                                   Low             ntp
BIG-IQ Cloud and Orchestration  1.0.0                              None                                   Low             ntp
F5 iWorkflow                    2.0.0                              None                                   Low             ntp
LineRate                        None                               2.5.0 - 2.6.1                          Not vulnerable  None
F5 MobileSafe                   None                               1.0.0                                  Not vulnerable  None
F5 WebSafe                      None                               1.0.0                                  Not vulnerable  None
Traffix SDC                     None                               5.0.0                                  Not vulnerable  None
                                                                   4.0.0 - 4.4.0

Vulnerability 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 Versions known to be not vulnerable 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.

F5 responds to vulnerabilities in accordance with the Severity values 
published in the previous table. The Severity values and other security 
vulnerability parameters are defined in SOL4602: Overview of the F5 security 
vulnerability response policy.

To mitigate this vulnerability, you can configure multiple time sources to 
mitigate the risk of any single time source being impacted by this attack. 
Ingress filtering by an upstream firewall, as recommended in BCP-38, can 
reduce the risk of exposure to spoofed packets.

Impact of action: Performing the suggested action should not have a negative 
impact on your system.

Supplemental Information

    SOL9970: Subscribing to email notifications regarding F5 products

    SOL9957: Creating a custom RSS feed to view new and updated documents

    SOL4918: Overview of the F5 critical issue hotfix policy

    SOL167: Downloading software and firmware from F5

    SOL13123: Managing BIG-IP product hotfixes (11.x - 12.x)

    SOL10025: Managing BIG-IP product hotfixes (10.x)

    SOL9502: BIG-IP hotfix matrix

    SOL15106: Managing BIG-IQ product hotfixes

    SOL15113: BIG-IQ hotfix matrix

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