SOL16393 - NTP vulnerability CVE-2014-9751

2015-04-09T00:00:00
ID SOL16393
Type f5
Reporter f5
Modified 2016-07-18T00:00:00

Description

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 for the BIG-IP or BIG-IQ systems, you may perform one or more of the following tasks:

  • Make sure you expose the management interface only on trusted networks.
  • Configure the external firewall device to block all packets with the source of ::1. Blocking IPv6 on an external device is also a mitigation.
  • Modify the NTP configuration to prevent remote modifications to the configuration. To do so run the following tmsh commands:

    • tmsh modify sys ntp restrict replace-all-with { "::1" { address ::1 no-modify enabled no-trap enabled } }
    • tmsh save /sys config

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)
  • SOL9502: BIG-IP hotfix matrix
  • SOL17329: BIG-IP GTM name has changed to BIG-IP DNS