47fcec43ab
Fixes CVEs:
- CVE-2022-3924: Fix serve-stale crash when recursive clients
soft quota is reached.
- CVE-2022-3736: Handle RRSIG lookups when serve-stale is
active.
- CVE-2022-3094: An UPDATE message flood could cause named to
exhaust all available memory. This flaw was addressed by adding
a new "update-quota" statement that controls the number of
simultaneous UPDATE messages that can be processed or
forwarded. The default is 100. A stats counter has been added to
record events when the update quota is exceeded, and the XML and
JSON statistics version numbers have been updated.
Signed-off-by: Noah Meyerhans <frodo@morgul.net>
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