CVE-2021-26896

Меры по смягчению последствий

The following mitigating factors may be helpful in your situation:

To be vulnerable, a DNS server would need to have dynamic updates enabled.

FAQ

Can this vulnerability by mitigated by enabling Secure Zone Updates?

Enabling Secure Zone Updates constrains the potential sources of the attack, but does not completely prevent it. For example, a malicious insider could attack a “secure zone update” DNS server from a domain-joined computer. This is only a partial mitigation.

Does this vulnerability impact just standalone DNS Primary Authoritative Server and not a DNS Server integrated with Active Directory?

This vulnerability impacts any DNS server. The surrounding configuration can limit possible vectors/sources for the attack, but proper mitigation requires this month’s security update patch.

If my server is not configured to be a DNS server, it is vulnerable?

No, this vulnerability is only exploitable if the server is configured to be a DNS server.