Original commit message:
ares_parse_naptr_reply: check sufficient data
Check that there is enough data for the required elements
of an NAPTR record (2 int16, 3 bytes for string lengths)
before processing a record.
This patch fixes CVE-2017-1000381
The c-ares function ares_parse_naptr_reply(), which is used for
parsing NAPTR responses, could be triggered to read memory outside
of the given input buffer if the passed in DNS response packet was
crafted in a particular way.
Refs: https://c-ares.haxx.se/adv_20170620.html
Refs: https://c-ares.haxx.se/CVE-2017-1000381.patch
PR-URL: https://github.com/nodejs/node-private/pull/88
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
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