Fixes the following security issues:
- (9.11.18) DNS rebinding protection was ineffective when BIND 9 is
configured as a forwarding DNS server. Found and responsibly reported by
Tobias Klein. [GL #1574]
- (9.11.19) To prevent exhaustion of server resources by a maliciously
configured domain, the number of recursive queries that can be triggered
by a request before aborting recursion has been further limited. Root and
top-level domain servers are no longer exempt from the
max-recursion-queries limit. Fetches for missing name server address
records are limited to 4 for any domain. This issue was disclosed in
CVE-2020-8616. [GL #1388]
- (9.11.19) Replaying a TSIG BADTIME response as a request could trigger an
assertion failure. This was disclosed in CVE-2020-8617. [GL #1703]
Also update the COPYRIGHT hash for a change of copyright year and adjust the
spacing for the new agreements.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
89a5d21627