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AUSCERT External Security Bulletin Redistribution
ESB-2016.1531
sol03331206: NTP vulnerability CVE-2016-4955
16 June 2016
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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
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2016-4955
Reference: ESB-2016.1411
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/03/sol03331206.html
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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)
Impact
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
table:
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
11.2.1
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
11.2.1
BIG-IP APM 12.0.0 - 12.1.0 Low ntp
11.4.0 - 11.6.1 None
11.2.1
10.2.1 - 10.2.4
BIG-IP ASM 12.0.0 - 12.1.0 Low ntp
11.4.0 - 11.6.1 None
11.2.1
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
11.2.1
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
11.2.1
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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