SOL41613034 - NTP vulnerability CVE-2016-2519

ID SOL41613034
Type f5
Reporter f5
Modified 2016-05-26T00:00:00


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, do not permit the use of writevar, readvar, and related functions via ntpq/ntpdc.

Note: The writevar, readvar, and related functions required to exploit this vulnerability are not enabled in the default configuration. Customizing the NTP configuration to enable these functions would require special permissions granted through an ntpd include parameter in the Traffic Management Shell (tmsh). If the system has been configured with a vulnerable custom NTP configuration, you should remove the customizations.

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