*The LTM and GTM modules are not vulnerable by default. To be vulnerable, recursion must be manually enabled in the BIND named.conf file.
If the previous table lists a version in the Versions known to be not vulnerable column, you can eliminate this vulnerability by upgrading to the listed version. If the listed version is older than the version you are currently running, or if the table does not list any version in the column, then no upgrade candidate currently exists.
F5 is responding to this vulnerability as determined by the parameters defined in SOL4602: Overview of the F5 security vulnerability response policy.
Determining if recursion has been manually enabled on the system
Log in to the BIG-IP command line.
Type the following command:
grep recursion /var/named/config/named.conf
If the command returns the following response, recursion has not been enabled, and the system is not vulnerable.
Mitigating the vulnerability
To mitigate this vulnerability, you can turn recursion off in the named.conf file. To do so, perform the following procedure:
Impact of action: This modification requires a change to your configuration, and you should test it in an appropriate environment before implementing it.
cp named.conf named.conf.SOL15927
bigstart restart named