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AUSCERT External Security Bulletin Redistribution
ESB-2016.1483
sol65271605: NTP vulnerability CVE-2016-1549
14 June 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
F5 ARX
F5 Enterprise Manager
F5 BIG-IQ products
Publisher: F5 Networks
Operating System: Network Appliance
Virtualisation
Impact/Access: Denial of Service -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2016-1549
Reference: ASB-2016.0046
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/65/sol65271605.html
Comment: There are currently no patches available for this vulnerability. In
the meantime, administrators should consider risk reduction
strategies such as restricting external network access and reviewing
user permissions on the devices.
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sol65271605: NTP vulnerability CVE-2016-1549
Security Advisory
Original Publication Date: 06/13/2016
Updated Date: 06/13/2016
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-2016-1549)
Impact
When configured to use trustedkey authentication, a remote attacker with
access to the private symmetric key can disrupt timekeeping.
Security Issue Status
F5 Product Development has assigned ID 591985 (BIG-IP), ID 594057 (BIQ-IQ), ID
594059 (Enterprise Manager), and ID 507785 (ARX) to this vulnerability, and
has evaluated the currently supported releases for potential 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 ntpd
11.0.0 - 11.6.1
10.1.0 - 10.2.4
BIG-IP AAM 12.0.0 - 12.1.0 None Low ntpd
11.4.0 - 11.6.1
BIG-IP AFM 12.0.0 - 12.1.0 None Low ntpd
11.3.0 - 11.6.1
BIG-IP Analytics 12.0.0 - 12.1.0 None Low ntpd
11.0.0 - 11.6.1
BIG-IP APM 12.0.0 - 12.1.0 None Low ntpd
11.0.0 - 11.6.1
10.1.0 - 10.2.4
BIG-IP ASM 12.0.0 - 12.1.0 None Low ntpd
11.0.0 - 11.6.1
10.1.0 - 10.2.4
BIG-IP DNS 12.0.0 - 12.1.0 None Low ntpd
BIG-IP Edge Gateway 11.0.0 - 11.3.0 None Low ntpd
10.1.0 - 10.2.4
BIG-IP GTM 11.0.0 - 11.6.1 None Low ntpd
10.1.0 - 10.2.4
BIG-IP Link Controller 12.0.0 - 12.1.0 None Low ntpd
11.0.0 - 11.6.1
10.1.0 - 10.2.4
BIG-IP PEM 12.0.0 - 12.1.0 None Low ntpd
11.3.0 - 11.6.1
BIG-IP PSM 11.0.0 - 11.4.1 None Low ntpd
10.1.0 - 10.2.4
BIG-IP WebAccelerator 11.0.0 - 11.3.0 None Low ntpd
10.1.0 - 10.2.4
BIG-IP WOM 11.0.0 - 11.3.0 None Low ntpd
10.1.0 - 10.2.4
ARX 6.0.0 - 6.4.0 None Low ntpd
Enterprise Manager 3.0.0 - 3.1.1 None Low ntpd
FirePass None 7.0.0 Not vulnerable None
6.0.0 - 6.1.0
BIG-IQ Cloud 4.0.0 - 4.5.0 None Low ntpd
BIG-IQ Device 4.2.0 - 4.5.0 None Low ntpd
BIG-IQ Security 4.0.0 - 4.5.0 None Low ntpd
BIG-IQ ADC 4.5.0 None Low ntpd
BIG-IQ Centralized Management 4.6.0 None Low ntpd
BIG-IQ Cloud and Orchestration 1.0.0 None Low ntpd
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, if configured, disable trustedkey
authentication for NTP and/or ensure that the private key is known only to
trusted hosts. Additionally, you can configure multiple time sources to
mitigate the risk of any single time source being impacted by this attack.
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 NTP FAQ - Advanced
Configuration
Note: This link takes you to a resource outside of AskF5. The third party
could remove the document without our knowledge.
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