The flaw, tracked as CVE-2021-25218, affects BIND versions 9.16.19, 9.17.16, and 9.16.19-S1. Patches are included in versions ​​9.16.20, 9.17.17 and 9.16.20-S1. Workarounds are also available. It’s worth noting that while the existence of the vulnerability was made public on August 18, customers received a notification one week in advance. The vulnerability can be exploited remotely…