BIND servers are vulnerable to a DoS and possible RCE if they are running an affected version and are configured to use GSS-TSIG features, which is not the default, but a common configuration in networks where BIND is integrated with Samba as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers.
This vulnerability affects BIND versions from 9.11 to 9.16. It can be triggered remotely and without authentication.
In a recent analysis we found ISC Bind version 9.11 accounting for half of the installatrions found online, so this vulnerability poses a real threat.
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