records with an incorrect class to be be accepted,
triggering a REQUIRE failure when those records
were subsequently cached. (CVE-2015-8000) [RT #4098]
(cherry picked from commit c8821d124c)
4168. [security] A buffer accounting error could trigger an
assertion failure when parsing certain malformed
DNSSEC keys. (CVE-2015-5722) [RT #40212]
(cherry picked from commit ce9f893e21)
3938. [func] Added quotas to be used in recursive resolvers
that are under high query load for names in zones
whose authoritative servers are nonresponsive or
are experiencing a denial of service attack.
- "fetches-per-server" limits the number of
simultaneous queries that can be sent to any
single authoritative server. The configured
value is a starting point; it is automatically
adjusted downward if the server is partially or
completely non-responsive. The algorithm used to
adjust the quota can be configured via the
"fetch-quota-params" option.
- "fetches-per-zone" limits the number of
simultaneous queries that can be sent for names
within a single domain. (Note: Unlike
"fetches-per-server", this value is not
self-tuning.)
- New stats counters have been added to count
queries spilled due to these quotas.
These options are not available by default;
use "configure --enable-fetchlimit" (or
--enable-developer) to include them in the build.
See the ARM for details of these options. [RT #37125]
4063. [bug] Asynchronous zone loads were not handled
correctly when the zone load was already in
progress; this could trigger a crash in zt.c.
[RT #37573]
(cherry picked from commit 7acc2f2156)
(cherry picked from commit 62fd632bcb)
- the counters weren't set correctly when fetches timed out.
instead we now pass down a counter object.
(cherry picked from commit 05e448935c)
(cherry picked from commit 6c049c57d9)
4006. [security] A flaw in delegation handling could be exploited
to put named into an infinite loop. This has
been addressed by placing limits on the number
of levels of recursion named will allow (default 7),
and the number of iterative queries that it will
send (default 50) before terminating a recursive
query (CVE-2014-8500).
The recursion depth limit is configured via the
"max-recursion-depth" option. [RT #35780]
3824. [bug] A collision between two flag values could cause
problems with cache cleaning when SIT was enabled.
[RT #35858]
(cherry picked from commit e01fbe2a45)
