K48224824 : BIG-IP DNS Cache vulnerability CVE-2018-5532

Security Advisory Description

On F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.0-11.6.3.1, or 11.2.1-11.5.6 a domain name cached within the DNS Cache of TMM may continue to be resolved by the cache even after the parent server revokes the record, if the DNS Cache is receiving a stream of requests for the cached name. (CVE-2018-5532)

Impact

The BIG-IP system may continue to serve responses from the DNS Cache for as long as the system receives requests for the cached name, even though the authoritative nameserver removed the name.